traceroute mpls rsvp
Syntax
Release Information
Command introduced in Junos OS Release 9.2.
egress, multipoint, and ttl options added in Junos OS Release 11.2.
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. |
egress | — | (Optional) Request that a specific point-to-multipoint egress node reply to the trace route. The trace route would follow the associated sub-LSP to the egress node. |
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. |
multipoint | — | (Optional) Perform a trace route on a point-to-multipoint LSP. |
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. |
ttl | — | (Optional) Specify the number of hops to follow before forcing the trace route to quit. |
Required Privilege Level
network
List of Sample Output
traceroute mpls rsvptraceroute mpls rsvp detail
traceroute mpls rsvp multipoint (branch node for sub-LSPs)
traceroute mpls rsvp multipoint (single-hop sub-LSPs)
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). Displays Success if the trace to a hop is successful or Egress if the trace has reached the last router on the path. | 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 | Displays 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 |
Path | Displays the sub-lsp path number for this traceroute, the interface used, and the destination address. | all levels |
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 127.0.0.64traceroute mpls rsvp detail
user@host> traceroute mpls rsvp lsp-chicago-atlanta detailProbe 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
traceroute mpls rsvp multipoint (branch node for sub-LSPs)
The following traceroute output is for a point-to-multipoint LSP where the penultimate node is a branch node for the sub-LSPs.
user@host> traceroute mpls rsvp multipoint p2mplsp Probe options: retries 3, exp 7
ttl Label Protocol Address Previous Hop Probe Status
1 300000 RSVP-TE 81.1.2.2 (null) Success
2 299968 RSVP-TE 81.2.3.3 81.1.2.2 Success
3 299952 RSVP-TE 81.3.4.4 81.2.3.3 Success
4 299920 RSVP-TE 81.4.6.6 81.3.4.4 Egress
Path 1 via lt-1/2/0.102 destination 127.0.0.64
ttl Label Protocol Address Previous Hop Probe Status
4 299920 RSVP-TE 81.4.5.5 81.3.4.4 Egress
Path 2 via lt-1/2/0.102 destination 127.0.0.64traceroute mpls rsvp multipoint (single-hop sub-LSPs)
The following traceroute output is for a point-to-multipoint LSP with multiple single-hop sub-LSPs.
user@host> traceroute mpls rsvp multipoint p2mplsp Probe options: retries 3, exp 7
ttl Label Protocol Address Previous Hop Probe Status
1 0 RSVP-TE 81.1.2.2 (null) Egress
Path 1 via lt-1/2/0.102 destination 127.0.0.64
ttl Label Protocol Address Previous Hop Probe Status
1 0 RSVP-TE 81.1.8.8 (null) Egress
Path 2 via lt-1/2/0.108 destination 127.0.0.64
ttl Label Protocol Address Previous Hop Probe Status
1 0 RSVP-TE 81.1.9.9 (null) Egress
Path 3 via lt-1/2/0.109 destination 127.0.0.64
