Technical Documentation

traceroute mpls rsvp

Syntax

traceroute mpls <rsvp> lsp-name<detail><exp><logical-system><no-resolve><retries><source source-address>

Release Information

Command introduced in Junos OS Release 9.2.

Description

Trace route to a remote host for an MPLS LSP signaled by RSVP. Use traceroute mpls rsvp as a debugging tool to locate MPLS label-switched path (LSP) forwarding issues in a network. (Currently supported for IPv4 packets only.)

Options

lsp-name: Specify the name of the LSP to be traced.
detail: (Optional) Display detailed output.
exp: (Optional) Specify the class-of-service to use when sending probes. The range of values is 0 through 7. The default value is 7.
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.
retries: (Optional) Specify the number of times to resend probe. The range of values is 1 through 9. The default value is 3.
source source-address: (Optional) Specify the source address of the outgoing traceroute packets.

Required Privilege Level

network

List of Sample Output

traceroute mpls rsvp
traceroute mpls rsvp detail

Output Fields

Table 1 describes the output fields for the traceroute mpls rsvp lsp-name and traceroute mpls rsvp lsp-name detail commands. Output fields are listed in the approximate order in which they appear.

Table 1: traceroute mpls rsvp Output Fields

Field Name	Field Description	Level of Output
Probe options	Probe options specified in the traceroute mpls rsvp lsp-name command.	all levels
ttl	Time to live value of the labeled packet.	none specified
Label	MPLS label used to forward the packets along the LSP.	none specified
Protocol	Signaling protocol used. For this command, it is RSVP-TE.	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
Sender timestamp	Display the timestamp when the MPLS echo request is sent to the next hop.	detail
Receiver timestamp	Timestamp when the echo request from the previous hop is received and acknowledged with an echo response by the next hop.	detail
Response time	Time for the echo request to reach the receiver.	detail
MTU	Size of the largest packet that includes the label stack forwarded to the next hop.	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 rsvp

user@host> traceroute mpls rsvp lsp-chicago-atlanta

     Probe options: retries 3, exp 7

     ttl    Label  Protocol    Address          Previous Hop     Probe Status
       1   299792  RSVP—TE        192.168.1.2      (null)           Success
       2   299803  RSVP—TE        192.168.2.3      192.168.1.2      Success
       3        3  RSVP—TE        192.168.3.4      192.168.2.3      Egress

     Path 1 via ge-0/0/0.1 destination 127.0.0.64

traceroute mpls rsvp detail

user@host> traceroute mpls rsvp lsp-chicago-atlanta detail

Probe options: retries 3, exp 7

   Hop 192.168.1.2 Depth 1
     Probe status: Success
     Parent: (null)
     Return code: Label-switched at stack-depth 1
     Sender timestamp: 2008-04-17 09:35:27 EDT 400.88 msec
     Receiver timestamp: 2008-04-17 09:35:27 EDT 427.87 msec
     Response time: 26.99 msec
     MTU: Unknown
     Multipath type: IP bitmask
       Address Range 1: 127.0.0.64 ~ 127.0.0.127
     Label Stack:
       Label 1 Value 299792 Protocol RSVP-TE

Hop 192.168.2.3 Depth 2
     Probe status: Success
     Parent: 192.168.1.2
     Return code: Upstream interface index unknown label-switched at stack-depth 1
     Sender timestamp: 2008-04-17 09:35:27 EDT 522.13 msec
     Receiver timestamp: 2008-04-17 09:35:27 EDT 548.69 msec
     Response time: 26.55 msec
     MTU: 1518
     Multipath type: IP bitmask
       Address Range 1: 127.0.0.64 ~ 127.0.0.127
     Label Stack:
       Label 1 Value 299803 Protocol RSVP-TE