Brocade TurboIron 24X Series Configuration Guide - Manual (Page 886)

852 Brocade TurboIron 24X Series Configuration Guide
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Tracing a multicast route
TurboIron(config)#router pim
TurboIron(config-pim-router)#bsr-candidate loopback 1 32 100
TurboIron(config-pim-router)#rp-candidate loopback 1 group-list 5
Syntax: [no] rp-candidate ethernet <portnum> | loopback <num> | ve <num> [group-list
<access-list-num>]
The <portnum> | loopback <num> | ve <num> parameter specifies the interface. The Layer 3
Switch will advertise the specified interface IP address as a candidate RP:
• Enter ethernet <portnum> for a physical interface (port).
• Enter ve <num> for a virtual interface.
• Enter loopback <num> for a loopback interface.
The group-list <access-list-num> indicates that a standard ACL is used to filter for which multicast
group the advertisement will be made.
NOTE
Extended ACLs cannot be used for group-list.
Tracing a multicast route
The Brocade implementation of Mtrace is based on “A ‘traceroute’ facility for IP Multicast”, an
Internet draft by S. Casner and B. Fenner. To trace a PIM route, use the following CLI method.
To trace a PIM route to PIM source 10.157.24.62 in group 239.255.162.1, enter a command such
as the following.
TurboIron#mtrace source 10.157.24.62 group 239.255.162.1
Type Control-c to abort
Tracing the route for tree 10.157.23.188
0 10.95.7.2
0 10.95.7.2 Thresh 0
1 10.95.7.1 Thresh 0
2 10.95.8.1 Thresh 0
3 10.157.24.62
Syntax: mtrace source <ip-addr> group <multicast-group>
The source <ip-addr> parameter specifies the address of the route source.
NOTE
In IP multicasting, a route is handled in terms of its source, rather than its destination. When you
trace an IP route, you specify its destination, but when you trace a PIM route, you specify its source.
The group <multicast-group> parameter specifies the PIM group the source IP address is in.
Figure 110 shows an example of an IP multicast group. The command example shown above is
entered on PIM router A.
FIGURE 110 Example of a PIM group