mtrace to-gateway
Syntax
Release Information
Command introduced before Junos OS Release 7.4.
Command introduced in Junos OS Release 9.0 for EX Series switches.
Description
Display trace information about a multicast path from this router or switch to a gateway router or switch.
Options
- gateway gateway
Send the trace query to a gateway multicast address.
- brief | detail
(Optional) Display the specified level of output.
- extra-hops extra-hops
(Optional) Number of hops to take after reaching a nonresponsive router or switch. You can specify a number between 0 and 255.
- group group
(Optional) Group address for which to trace the path. The default group address is 0.0.0.0.
- interface interface-name
(Optional) Source address for sending the trace query.
- interval interval
(Optional) Number of seconds to wait before gathering statistics again. The default value is 10.
- loop
(Optional) Loop indefinitely, displaying rate and loss statistics.
- max-hops max-hops
(Optional) Maximum hops to trace toward the source. You can specify a number between 0 and 255.. The default value is 32.
- max-queries max-queries
(Optional) Maximum number of query attempts for any hop. You can specify a number between 0 and 255.. The default value is 3.
- multicast-response
(Optional) Always request the response using multicast.
- no-resolve
(Optional) Do not attempt to display addresses symbolically.
- no-router-alert
(Optional) Do not use the router-alert IP option.
- response response
(Optional) Send trace response to a host or multicast address.
- routing-instance routing-instance-name
(Optional) Trace a particular routing instance.
- ttl ttl
(Optional) IP time-to-live value. You can specify a number between 0 and 225. Local queries to the multicast group use TTL 1. Otherwise, the default value is 127.
- unicast-response
(Optional) Always request the response using unicast.
- wait-time wait-time
(Optional) Number of seconds to wait for a response. The default value is 3.
Required Privilege Level
view
List of Sample Output
mtrace to-gatewayOutput Fields
Table 1 describes the output fields for the mtrace to-gateway command. Output fields are listed in the approximate order in which they appear.
Table 1: mtrace to-gateway Output Fields
Field Name | Field Description |
|---|---|
Mtrace from | IP address of the receiver. |
to | IP address of the source. |
via group | IP address of the multicast group (if any). |
Querying full reverse path | Indicates the full reverse path query has begun. |
number-of-hops | Number of hops from the source to the named router or switch. |
router-name | Name of the router or switch for this hop. |
address | Address of the router or switch for this hop. |
protocol | Protocol used (for example, PIM). |
Round trip time | Average round-trip time, in milliseconds (ms). |
total ttl of | Time-to-live (TTL) threshold. |
Sample Output
mtrace to-gateway
user@host> mtrace to-gateway gateway 192.1.3.2
group 225.1.1.1 interface 192.1.1.73 brief
Mrace from 192.1.1.73 to 192.1.1.2 via group 225.1.1.1 Querying full reverse path... * * 0 routerA.lab.mycompany.net (192.1.1.2) -1 routerA.lab.mycompany.net (192.1.1.2) PIM thresh^ 1 -2 routerB.lab.mycompany.net (192.1.2.2) PIM thresh^ 1 -3 routerC.lab.mycompany.net (192.1.3.2) PIM thresh^ 1 Round trip time 2 ms; total ttl of 3 required.
