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.
Command introduced in Junos OS Release 11.3 for the QFX Series.
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
Mtrace 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.
