traceroute mpls rsvp
Syntax
traceroute mpls <rsvp> lsp-name <detail> <egress> <exp> <logical-system> <multipoint> <no-resolve> <retries> <source source-address> <ttl>
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
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.
Field Name |
Field Description |
Level of Output |
|---|---|---|
Probe options |
Probe options specified in the |
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 |
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. |
|
Parent |
Address of the previous hop. Parent value for the first hop is null. |
|
Return Code |
Return code for reporting the result of processing the echo request by the receiver. |
|
Sender timestamp |
Displays the timestamp when the MPLS echo request is sent to the next hop. |
|
Receiver timestamp |
Timestamp when the echo request from the previous hop is received and acknowledged with an echo response by the next hop. |
|
Response time |
Time for the echo request to reach the receiver. |
|
MTU |
Size of the largest packet that includes the label stack forwarded to the next hop. |
|
Multipath type |
Labels or addresses used by the specified multipath type. If multipaths are not used, the value is none. |
|
Label stack |
Label stack used to forward the packet. |
|
Path |
Displays the sub-lsp path number for this traceroute, the interface used, and the destination address. |
all levels |
Sample Output
- traceroute mpls rsvp
- traceroute mpls rsvp detail
- traceroute mpls rsvp multipoint (branch node for sub-LSPs)
- traceroute mpls rsvp multipoint (single-hop sub-LSPs)
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 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
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 127.0.0.64Release Information
Command introduced in Junos OS Release 9.2.
egress, multipoint, and ttl options added in Junos OS Release 11.2.