The 7450 ESS, 7750 SR, and 7950 XRS routers support VCCV Ping and VCCV Trace on single segment PWs and multi-segment PWs where every segment has static labels and a configured MPLS-TP PW Path ID. It also supports VCCV Ping and Trace on MS-PWs here a static MPLS-TP PW segment is switched to a dynamic T-LDP signaled segment.
Static MS-PW PWs are referred to with the sub-type static in the vccv-ping and vccv-trace command. This indicates to the system that the rest of the command contains parameters that are applied to a static PW with a static PW FEC.
Two ACH channel types are supported: the IPv4 ACH channel type, and the non-IP ACH channel type (0x0025). This is known as the non-ip associated channel. This is the default for type static. The Generic ACH Label (GAL) is not supported for PWs.
If the IPv4 associated channel is specified, then the IPv4 channel type is used (0x0021). In this case, a destination IP address in the 127/8 range is used, while the source address in the UDP/IP packet is set to the system IP address, or may be explicitly configured by the user with the src-ip-address option. This option is only valid if the IPv4 control-channel is specified.
The reply mode is always assumed to be the same application level control channel type for type static.
As with other PW types, the downstream mapping and detailed downstream mapping TLVs (DSMAP/DDMAP TLVs) are not supported on static MPLS-TP PWs.
The follow CLI command description shows the options that are only allowed if the type static option is configured. All other options are blocked.
vccv-ping static sdp-id:vc-id [target-fec-type pw-id-fec sender-src-address ip-addr remote-dst-address ip-address pw-id pw-id pw-type pw-type] [dest-global-id global-id dest-node-id node-id] [assoc-channel ipv4 | non-ip] [fc fc-name [profile {in | out}]] [size octets] [count send-count] [timeout timeout] [interval interval] [ttl vc-label-ttl] [src-ip-address ip-addr]
vccv-trace static sdp-id:vc-id [assoc-channel ipv4 | non-ip] [src-ip-address ipv4-address] [target-fec-type pw-id sender-src-address ip-address remote-dst-address ip-address pw-id pw-id pw-type pw-type] [detail] [fc fc-name [profile in | out]] [interval interval-value] [max-fail no-response-count] [max-ttl max-vc-label-ttl] [min-ttl min-vc-label-ttl] [probe-count probe-count] [size octets] [timeout timeout-value]
If the spoke SDP referred to by the sdp-id:vc-id has an MPLS-TP PW-Path-ID defined, then those parameters are used to populate the static PW TLV in the target FEC stack of the vccv-ping or vccv-trace packet. If a Global-ID and Node-ID is specified in the command, then these values are used to populate the destination node TLV in the vccv-ping or vccv-trace packet.
The global-id/node-id are only used as the target node identifiers if the vccv-ping is not end-to-end (for example, a TTL is specified in the vccv-ping or trace command and it is < 255), otherwise the value in the PW Path ID is used. For vccv-ping, the dest-node-id may be entered as a 4-octet IP address <a.b.c.d> or 32-bit integer <1 to 4294967295>. For vccv-trace, the destination node-id and global-id are taken form the spoke SDP context.
The same command syntax is applicable for SAA tests configured under configure saa test a type.