Brocade Multi-Service IronWare Administration Guide (Supporting R05.6.00) - Manual (Page 236)

218 Multi-Service IronWare Administration Guide
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LSP ping and traceroute
6
The timeout option specifies an interval in milliseconds for the echo request message. The default
timeout is 5 seconds. The maximum timeout value is 5 minutes.
The nexthop specifies the nexthop IPv4 address to send the OAM request to. If an address that
does not match the outgoing path for the tunnel is given, following error message appears as
response:
Traceroute fails: LDP next-hop does not exist.
Executing RSVP LSP traceroute
The RSVP LSP traceroute command in the (enable) mode, sends and MPLS echo request from the
ingress to the egress LSR.
To perform the RSVP LSP traceroute operation, use the following command.
Brocade # traceroute mpls rsvp lsp toxmr2frr-18
Trace RSVP LSP toxmr2frr-18, timeout 5000 msec, TTL 1 to 30
Type Control-c to abort
1 1ms 10.22.22.22 return code 3(Egress)
Brocade#
Syntax: traceroute mpls rsvp lsp lsp-name | session tunnel-source-address tunnel-
destination-address tunnel-id [destination ip-address] [dsmap] [detour] [min-ttl min-num]
[max-ttl max-num] [reply-mode router-alert] [reply-tos num] [size bytes] [source ip-address]
[standby] [timeout msec]
The rsvp lsp option specifies the name of the RSVP IPv4 LSP in the lsp-name variable.
The rsvp session option specifies the session ID. The tunnel-source-address, tunnel-
destination-address and tunnel-id variables must all be specified to form a valid session ID.
The destination option specifies an IP address within the 127/8 subnet. The default address is
127.0.0.1
The dsmap option enables the Downstream (DS) mapping TLV in the echo request for traceroute
operation. The DS mapping TLV is used to instruct the transit LSR to include the next-hop interface
and label information in the echo reply. By default, the DS TLV is not included in the echo request.
The detour option specifies a traceroute detour path. For a detour originated on the ingress LSR,
you can ping the detour path using either the LSP name or session ID with the detour option
specified.
The reply-mode router-alert option is used when the normal IP return path is unreliable. This option
indicates that the reply should be sent as an IPv4 UDP packet with the Router Alert option. This
option requires extra overhead processing at each LSR along the return path.
The reply-tos option specifies a TOS value between 0 and 254 to be included in the Reply-TOS-byte
TLV. This value will be copied to the IP header TOS byte of the echo reply. By default, the reply-tos
TLV is not included in the echo request.
NOTE
The last bit of the TOS byte is always 0.
The size option specifies that the size of the echo request including the label stack to be sent will
be the value of the variable bytes. The pad TLV is used to fill the echo request message to the
specified size. The minimum size is 92 bytes for an MPLS Echo request. The maximum size is the
size of the LSP MTU.