Appendix A.  Survey Responses

   The detailed responses are included in this appendix.  The respondent
   contact info has been removed.

A.1.  Respondent 1

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 423

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Ethernet Tagged Mode - RFC 4448: Control Word (Type 1)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Tagged Mode - RFC 4448: LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode)

       Used in Network: Ethernet (Tagged Mode), Ethernet (Raw Mode)

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       No Response

A.2.  Respondent 2

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       Ethernet Raw Mode - RFC 4448

       SAToP - RFC 4553

       CESoPSN - RFC 5086

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 5000

       Ethernet Raw Mode - RFC 4448 - 1000

       SAToP - RFC 4553 - 50

       CESoPSN - RFC 5086 - 1600

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Ethernet Tagged Mode - RFC 4448: Control Word (Type 1), Router
       Alert Label (Type 2), TTL Expiry (Type 3)

       Ethernet Raw Mode - RFC 4448: Control Word (Type 1), Router Alert
       Label (Type 2), TTL Expiry (Type 3)

       CESoPSN - RFC 5086: TTL Expiry (Type 3)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Tagged Mode - RFC 4448: ICMP Ping, LSP Ping

       Ethernet Raw Mode - RFC 4448: ICMP Ping, LSP Ping

       SAToP - RFC 4553: LSP Ping

       CESoPSN - RFC 5086: LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode)

       Used in Network: No Response

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       I'm very interested in this work as we continue to experience
       interop challenges particularly with newer vendors to the space
       who are only implementing VCCV via control word.  Vendors who
       have tailed their MPLS OAM set specifically to the cell backhaul
       space and mandatory CW have been known to fall into this space.
       That's all I've got.

A.3.  Respondent 3

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       Ethernet Raw Mode - RFC 4448

       Frame Relay (Port Mode) - RFC 4619

       Frame Relay (1:1 Mode) - RFC 4619

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 800

       Ethernet Raw Mode - RFC 4448 - 50

       Frame Relay (Port Mode) - RFC 4619 - 2

       Frame Relay (1:1 Mode) - RFC 4619 - 2

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       No Response

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       No Response

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode)

       Used in Network: No Response

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       No Response

A.4.  Respondent 4

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       Ethernet Raw Mode - RFC 4448

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 1000

       Ethernet Raw Mode - RFC 4448 - 200

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       No Response

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Tagged Mode - RFC 4448: LSP Ping

       Ethernet Raw Mode - RFC 4448: LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode)

       Used in Network: No Response

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       EQUIPMENT MANUFACTURER does not provide options to configure VCCV
       control-channel and its sub options for LDP based L2Circuits.
       How can we achieve end-to-end management and fault detection of
       PW without VCCV in such cases?

A.5.  Respondent 5

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       Ethernet Raw Mode - RFC 4448

       PPP - RFC 4618

       Frame Relay (Port Mode) - RFC 4619

       Frame Relay (1:1 Mode) - RFC 4619

       Fiber Channel (Port Mode) - "Encapsulation Methods for Transport
       of Fibre Channel" (now RFC 6307)

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 4000

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Ethernet Tagged Mode - RFC 4448: Control Word (Type 1), Router
       Alert Label (Type 2)

       Ethernet Raw Mode - RFC 4448: Control Word (Type 1), Router Alert
       Label (Type 2)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Tagged Mode - RFC 4448: LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode)

       Used in Network: Ethernet (Tagged Mode), Ethernet (Raw Mode)

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       No Response

A.6.  Respondent 6

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       Ethernet Raw Mode - RFC 4448

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 1000+

       Ethernet Raw Mode - RFC 4448 - 500

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Ethernet Tagged Mode - RFC 4448: Control Word (Type 1)

       Ethernet Raw Mode - RFC 4448: Control Word (Type 1)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Tagged Mode - RFC 4448: ICMP Ping, LSP Ping

       Ethernet Raw Mode - RFC 4448: ICMP Ping, LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode)

       Used in Network: Ethernet (Tagged Mode), Ethernet (Raw Mode)

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       No Response

A.7.  Respondent 7

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Raw Mode - RFC 4448

       ATM (1:1 Mode) - RFC 4717

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Raw Mode - RFC 4448 - 20

       ATM (1:1 Mode) - RFC 4717 - 100

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       No Response

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Raw Mode - RFC 4448: LSP Ping

       ATM (1:1 Mode) - RFC 4717: LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode), PPP, HDLC, Frame Relay (Port Mode), ATM (N:1 Cell
       Mode)

       Used in Network: No Response

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       We are using L2PVPN AToM like-to-like models - ATMoMPLS - EoMPLS
       ATMoMPLS : This service offered for transporting ATM cells over
       IP/MPLS core with Edge ATM CE devices including BPX, Ericsson
       Media Gateway etc.  This is purely a Port mode with cell-packing
       configuration on it to have best performance.  QoS marking is
       done for getting LLQ treatment in the core for these MPLS
       encapsulated ATM packets.  EoMPLS: This service offered for
       transporting 2G/3G traffic from network such as Node-B to RNC's
       over IP/MPLS backbone core network.  QoS marking is done for
       getting guaranteed bandwidth treatment in the core for these MPLS
       encapsulated ATM packets.  In addition to basic L2VPN service
       configuration, these traffic are routed via MPLS TE tunnels with
       dedicated path and bandwidth defined to avoid bandwidth related
       congestion.

A.8.  Respondent 8

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Raw Mode - RFC 4448

       ATM (AAL5 SDU Mode) - RFC 4717

       TDMoIP - RFC 5087

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Raw Mode - RFC 4448 - In-Use

       ATM (AAL5 SDU Mode) - RFC 4717 - In-Use

       TDMoIP - RFC 5087 - In-Use

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Ethernet Raw Mode - RFC 4448: Control Word (Type 1)

       ATM (AAL5 SDU Mode) - RFC 4717: Router Alert Label (Type 2)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Raw Mode - RFC 4448: LSP Ping

       ATM (AAL5 SDU Mode) - RFC 4717: LSP Ping

       TDMoIP - RFC 5087: LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Raw Mode), ATM (N:1
       Cell Mode)

       Used in Network: Ethernet (Raw Mode), ATM (N:1 Cell Mode)

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       PW VCCV is very useful tool for finding faults in each PW
       channel.  Without this we can not find fault on a PW channel.  PW
       VCCV using BFD is another better option.  Interoperability
       challenges are with Ethernet OAM mechanism.

A.9.  Respondent 9

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       Frame Relay (1:1 Mode) - RFC 4619

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 19385

       Frame Relay (1:1 Mode) - RFC 4619 - 15757

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Frame Relay (1:1 Mode) - RFC 4619: Control Word (Type 1)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Frame Relay (1:1 Mode) - RFC 4619: LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode), PPP, HDLC, Frame Relay (Port Mode), ATM (N:1 Cell
       Mode)

       Used in Network: No Response

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       No Response

A.10.  Respondent 10

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Raw Mode - RFC 4448

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Raw Mode - RFC 4448 - 325

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Ethernet Raw Mode - RFC 4448: Control Word (Type 1)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Raw Mode - RFC 4448: ICMP Ping, LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: No Response

       Used in Network: No Response

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       No Response

A.11.  Respondent 11

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       Ethernet Raw Mode - RFC 4448

       PPP - RFC 4618 HDLC - RFC 4618

       Frame Relay (1:1 Mode) - RFC 4619

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 2000

       Ethernet Raw Mode - RFC 4448 - 100

       PPP - RFC 4618 - 500

       Frame Relay (1:1 Mode) - RFC 4619 - 200

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       No Response

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Tagged Mode - RFC 4448: ICMP Ping, LSP Ping

       Ethernet Raw Mode - RFC 4448: ICMP Ping, LSP Ping

       Frame Relay (1:1 Mode) - RFC 4619: ICMP Ping, LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode), PPP, HDLC

       Used in Network: Ethernet (Tagged Mode)

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       No Response

A.12.  Respondent 12

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Raw Mode - RFC 4448

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Raw Mode - RFC 4448 - 50000

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Ethernet Raw Mode - RFC 4448: Control Word (Type 1), Router Alert
       Label (Type 2), TTL Expiry (Type 3)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       No Response

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode)

       Used in Network: Ethernet (Tagged Mode), Ethernet (Raw Mode)

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       No Response

A.13.  Respondent 13

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       Ethernet Raw Mode - RFC 4448

       Frame Relay (1:1 Mode) - RFC 4619

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 3

       Ethernet Raw Mode - RFC 4448 - 10-20

       ATM (1:1 Mode) - RFC 4717 - 3

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Ethernet Tagged Mode - RFC 4448: Control Word (Type 1), TTL
       Expiry (Type 3)

       Ethernet Raw Mode - RFC 4448: Control Word (Type 1), TTL Expiry
       (Type 3)

       Frame Relay (1:1 Mode) - RFC 4619: Control Word (Type 1), TTL
       Expiry (Type 3)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Tagged Mode - RFC 4448: ICMP Ping, LSP Ping

       Ethernet Raw Mode - RFC 4448: ICMP Ping, LSP Ping

       Frame Relay (1:1 Mode) - RFC 4619: ICMP Ping, LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode), PPP, HDLC, Frame Relay (Port Mode), ATM (N:1 Cell
       Mode)

       Used in Network: Ethernet (Tagged Mode), Ethernet (Raw Mode),
       Frame Relay (Port Mode)

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       No Response

A.14.  Respondent 14

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       Ethernet Raw Mode - RFC 4448

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 150

       Ethernet Raw Mode - RFC 4448 - 100

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Ethernet Tagged Mode - RFC 4448: Control Word (Type 1), Router
       Alert Label (Type 2)

       Ethernet Raw Mode - RFC 4448: Control Word (Type 1), Router Alert
       Label (Type 2)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Tagged Mode - RFC 4448: LSP Ping

       Ethernet Raw Mode - RFC 4448: LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode), PPP, HDLC, Frame Relay (Port Mode)

       Used in Network: Ethernet (Tagged Mode), Ethernet (Raw Mode)

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       No Response

A.15.  Respondent 15

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       Ethernet Raw Mode - RFC 4448

       Frame Relay (1:1 Mode) - RFC 4619

       ATM (1:1 Mode) - RFC 4717

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 20,000

       Ethernet Raw Mode - RFC 4448 - 1000

       Frame Relay (1:1 Mode) - RFC 4619 - 30,000

       ATM (1:1 Mode) - RFC 4717 - 20,000

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Ethernet Tagged Mode - RFC 4448: TTL Expiry (Type 3)

       Ethernet Raw Mode - RFC 4448: TTL Expiry (Type 3)

       Frame Relay (1:1 Mode) - RFC 4619: TTL Expiry (Type 3)

       ATM (1:1 Mode) - RFC 4717: TTL Expiry (Type 3)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Tagged Mode - RFC 4448: LSP Ping

       Ethernet Raw Mode - RFC 4448: LSP Ping

       Frame Relay (1:1 Mode) - RFC 4619: LSP Ping

       ATM (1:1 Mode) - RFC 4717: LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: No Response

       Used in Network: No Response

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       COMPANY has deployed several MPLS network elements, from multiple
       vendors.  COMPANY is seeking a uniform implementation of VCCV
       Control Channel (CC) capabilities across its various vendor
       platforms.  This will provide COMPANY with significant advantages
       in reduced operational overheads when handling cross-domain
       faults.  Having a uniform VCCV feature implementation in COMPANY
       multi-vendor network leads to:

       o   Reduced operational cost and complexity

       o   Reduced OSS development to coordinate incompatible VCCV
           implementations.

       o   Increased end-end service availability when handing faults.

       In addition, currently some of COMPANY deployed VCCV traffic
       flows (on some vendor platforms) are not guaranteed to follow
       those of the customer's application traffic (a key operational
       requirement).  As a result, the response from the circuit ping
       cannot faithfully reflect the status of the circuit.  This leads
       to ambiguity regarding the operational status of our networks.
       An in-band method is highly preferred, with COMPANY having a
       clear preference for VCCV Circuit Ping using PWE Control Word.
       This preference is being pursued with each of COMPANY vendors.

A.16.  Respondent 16

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       Ethernet Raw Mode - RFC 4448

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - 100

       Ethernet Raw Mode - RFC 4448 - 100

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       No Response

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Tagged Mode - RFC 4448: ICMP Ping, LSP Ping

       Ethernet Raw Mode - RFC 4448: ICMP Ping, LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: Ethernet (Tagged Mode), Ethernet
       (Raw Mode)

       Used in Network: No Response

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       Using CV is not required at the moment

A.17.  Respondent 17

   2.  In your network in general, across all products, please indicate
       which pseudowire encapsulations your company has implemented.

       Ethernet Tagged Mode - RFC 4448

       SAToP - RFC 4553

       Frame Relay (Port Mode) - RFC 4619

       Frame Relay (1:1 Mode) - RFC 4619

       ATM (N:1 Mode) - RFC 4717

       ATM (1:1 Mode) - RFC 4717

       CESoPSN - RFC 5086

       TDMoIP - RFC 5087

   3.  Approximately how many pseudowires are deployed of each
       encapsulation type.  Note, this should be the number of
       pseudowires in service, carrying traffic, or pre-positioned to do
       so. ***Note, please indicate "In-Use" for any PW Encap Types
       which you are using but cannot provide a number.

       Ethernet Tagged Mode - RFC 4448 - >40k

       Ethernet Raw Mode - RFC 4448 - In-Use

       SAToP - RFC 4553 - >20k

       Frame Relay (Port Mode) - RFC 4619 - >5k

       Frame Relay (1:1 Mode) - RFC 4619 - >5k

       ATM (N:1 Mode) - RFC 4717 - >50k

       ATM (1:1 Mode) - RFC 4717 - >50k

       CESoPSN - RFC 5086 - >20k

       TDMoIP - RFC 5087 - >20k

   4.  Please indicate which VCCV Control Channel is used for each
       encapsulation type.  Understanding that users may have different
       networks with varying implementations, for your network in
       general, please select all which apply.

       Ethernet Tagged Mode - RFC 4448: Control Word (Type 1)

       SAToP - RFC 4553: Control Word (Type 1)

       Frame Relay (Port Mode) - RFC 4619: Control Word (Type 1)

       Frame Relay (1:1 Mode) - RFC 4619: Control Word (Type 1)

       ATM (N:1 Mode) - RFC 4717: Control Word (Type 1)

       ATM (1:1 Mode) - RFC 4717: Control Word (Type 1)

   5.  Please indicate which VCCV Connectivity Verification types are
       used in your networks for each encapsulation type.

       Ethernet Tagged Mode - RFC 4448: LSP Ping

       SAToP - RFC 4553: LSP Ping

       Frame Relay (Port Mode) - RFC 4619: LSP Ping

       Frame Relay (1:1 Mode) - RFC 4619: LSP Ping

       ATM (N:1 Mode) - RFC 4717: LSP Ping

       ATM (1:1 Mode) - RFC 4717: LSP Ping

   6.  Please indicate your network's support of and use of the Control
       Word for encapsulations for which the Control Word is optional.

       Supported by Network/Equipment: ATM (N:1 Cell Mode)

       Used in Network: No Response

   7.  Please use this space to provide any feedback regarding PW and
       VCCV deployments, VCCV interoperability challenges, this survey
       or any network/vendor details you wish to share.

       BFD VCCV Control Channel is not indicated in the survey (may be
       required for PW redundancy purpose)

Authors' Addresses

   Christopher N. "Nick" Del Regno (editor)
   Verizon Communications, Inc.
   400 International Pkwy
   Richardson, TX  75081
   US

   EMail: nick.delregno@verizon.com


   Andrew G. Malis (editor)
   Consultant

   EMail: agmalis@gmail.com