Brocade Multi-Service IronWare Administration Guide (Supporting R05.6.00) - Manual (Page 235)

Multi-Service IronWare Administration Guide 217
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LSP ping and traceroute
6
The standby option directs the ping operation to the secondary path of a redundant LSP that is
operationally up.
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.
Executing LDP LSP traceroute
The LDP LSP traceroute command in the (enable) mode, sends and MPLS echo request from the
ingress to the egress LSR.
To perform the LDP LSP traceroute operation, use the following command.
Brocade# traceroute mpls ldp 10.22.22.22
Trace LDP LSP to 10.22.22.22/32, timeout 5000 msec, TTL 1 to 30
Type Control-c to abort
1 10ms 10.22.22.22 return code 3(Egress)
Brocade)#
Syntax: traceroute mpls ldp ip-address/mask-length [destination ip-address] [dsmap] [min-ttl
min-num] [max-ttl max-num] [reply-mode router-alert] [reply-tos num] [size bytes] [source
ip-address] [timeout msec] [nexthop ipv4 address]
The ldp ip-address/mask-length variable specifies the LDP IPv4 destination prefix and mask
length. If the mask-length is not specified, the default value is 32.
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 min-ttl option specifies a minimum value in the min-num variable for the outermost label in
traceroute operation. The default minimum TTL value is 1. Acceptable values that can be
configured are: 1 - 255.
The max-ttl option specifies a maximum value in the max-num variable for the outermost label in
traceroute operation. The default maximum TTL value is 30. Acceptable values that can be
configured are: 1 - 255.
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.
The source option specifies the IP address of any interface. This address is used as the destination
address for the echo reply address. The default address is the LSR ID.