traceroute mpls segment-routing isis

Syntax

Description

Trace route to a remote host for a segment routing label-switched path added by the ISIS protocol. Use traceroute mpls segment-routing isis as a debugging tool to locate MPLS label-switched path forwarding issues in a network.

Options

algorithm algorithm-id (Optional) Specify the flexible algorithm identifier. The range of values is 0 through 255. The default value is 0 which means no algorithm is configured. The algorithm-id in conjunction with the prefix is used to distinguish labelled SR paths.

`fec`	Specify the IP address and optional prefix of the forwarding equivalence class (FEC).
destination `ip-address`	(Optional) Specify the destination address to use when sending probes. Values: The destination IP address must be within the 127.0.0.0/8 IP address space for Operation, Administration, and Maintenance (OAM) packets.
detail	(Optional) Display detailed output.
exp `exp`	(Optional) Specify the class-of-service to use when sending probes. Range: 0 through 7 Default: 7
fanout `fanout-number`	(Optional) Specify the maximum number of nexthops to search per node. Range: 1 through 16 Default: 16
logical-system	(Optional) Specify the name of the logical system for the traceroute attempt.
no-resolve	(Optional) Specify not to resolve the hostname that corresponds to the IP address.
paths `maximum-paths`	(Optional) Specify the maximum number of paths to search. Range: 1 through 255 Default: 16
retries `retries-number`	(Optional) Specify the number of times to resend probe values. Range: 1 through 9 Default: 3
routing-instance `routing-instance-name`	(Optional) Specify the name of the routing instance for the traceroute attempt.
source `source-address`	(Optional) Specify the source address of the outgoing traceroute packets.
ttl `value`	(Optional) Specify the maximum time-to-live value to include in the traceroute request, in seconds. Range: 1 through 125 Default: 64
wait `seconds`	(Optional) Specify the number of seconds to wait before resending a probe. Range: 5 through 15 Default: 10

Required Privilege Level

network

Output Fields

Table 1 describes the output fields for thetraceroute mpls segment-routing isis fec command and the traceroute mpls segment-routing isis fec detail commands. Output fields are listed in the approximate order in which they appear.

Table 1: traceroute mpls ldp Output Fields
Field Name	Field Description	Level of Output
Probe options	Probe options specified in the `traceroute mpls ldp fec` command.	all levels
ttl	Time to live value of the labeled packet.	none specified
Label	Outgoing label used for forwarding the packet along the label-switched paths.	none specified
Protocol	Signaling protocol used. For this command, it is LDP.	none specified
Address	Address of the next hop.	none specified
Previous Hop	Address of the previous hop. Previous hop address of the first hop is null.	none specified
Probe status	Forwarding status from the first hop to the last-hop label-switching router (egress point in the label-switched paths).	none specified
Hop	Address of the hops in the label-switched path from the first hop to the last hop. Depth indicates the level of the hop.	detail
Parent	Address of the previous hop. Parent value for the first hop is null.	detail
Return Code	Return code for reporting the result of processing the echo request by the receiver.	detail
Response time	Time for the echo request to reach the receiver.	detail
Multipath type	Labels or addresses used by the specified multipath type. If multipaths are not used, the value is none.	detail
Label Stack	Label stack used to forward the packet.	detail

Sample Output

traceroute mpls segment-routing isis
traceroute mpls segment-routing isis (Labelled IS-IS flexible-algorithm IPv4 traceroute)
traceroute mpls segment-routing isis (Labelled IS-IS flexible-algorithm IPv6 traceroute)
traceroute mpls segment-routing isis (Labelled IS-IS flexible-algorithm IPv4 traceroute, Ingress ECMP)