OAM and SAA Command Reference
7750 SR OS Services Guide Page 1449
vccv-ping
Syntax vccv-ping sdp-id:vc-id [src-ip-address ip-addr dst-ip-address ip-addr pw-id pw-id][reply-
mode {ip-routed|control-channel}] [fc fc-name [profile {in | out}]] [size octets] [count
send-count] [timeout timeout] [interval interval] [ttl vc-label-ttl]
Context oam
config>saa>test
Description This command configures a Virtual Circuit Connectivity Verification (VCCV) ping test. A vccv-ping
test checks connectivity of a VLL inband. It checks to verify that the destination (target) PE is the
egress for the Layer 2 FEC. It provides for a cross-check between the dataplane and the control plane.
It is inband which means that the vccv-ping message is sent using the same encapsulation and along
the same path as user packets in that VLL. The vccv-ping test is the equivalent of the lsp-ping test for
a VLL service. The vccv-ping reuses an lsp-ping message format and can be used to test a VLL
configured over both an MPLS and a GRE SDP.
Note that VCCV ping can be initiated on TPE or SPE. If initiated on the SPE, the reply-mode
parameter must be used with the ip-routed value The ping from the TPE can have either values or can
be omitted, in which case the default value is used.
If a VCCV ping is initiated from TPE to neighboring a SPE (one segment only) it is sufficient to only
use the sdpid:vcid parameter. However, if the ping is across two or more segments, at least the
sdpId:vcId, src-ip-address ip-addr, dst-ip-address ip-addr, ttl vc-label-ttland pw-id pw-id
parameters are used where:
• The src-ip-address is system IP address of the router proceeding destination router.
• The pwid
is actually the VC ID of the last pseudowire segment.
• The vc-label-ttl must have a value equal or higher than the number of pseudowire segments .
Parameters sdp-id:vc-id — The VC ID of the pseudowire being tested must be indicated with this parameter. The
VC ID needs to exist on the local router and the far-end peer needs to indicate that it supports
VCCV to allow the user to send vccv-ping message.
Values 1 — 17407:1 — 2147483647
src-ip-address ip-addr — Specifies the source IP address.
Values ipv4-address: a.b.c.d
dst-ip-address ip-addr — Specifies the destination IP address.
Values ipv4-address: a.b.c.d
pw-id pw-id — Specifies the pseudowire ID to be used for performing a vccv-ping operation. The
pseudowire ID is a non-zero 32-bit connection ID required by the FEC 128, as defined in RFE
4379, Detecting Multi-Protocol Label Switched (MPLS) Data Plane Failures.
reply-mode {ip-routed | control-channel} — The reply-mode parameter indicates to the far-end
how to send the reply message. The option ipv4 indicates a reply mode out-of-band using UDP
IPv4. The option control-channel indicates a reply mode in-band using vccv control channel.
Default control-channel
fc fc-name — The fc parameter is used to indicate the forwarding class of the MPLS echo request
packets. The actual forwarding class encoding is controlled by the network egress LSP-EXP
mappings.
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