Enabling And Disabling Rpf Checks - Juniper JUNOSE 11.0.X MULTICAST ROUTING Configuration Manual

JUNOSe 11.0.x Multicast Routing Configuration Guide

Enabling and Disabling RPF Checks

By default, the router accepts multicast packets for each (S,G) pair on an incoming
interface (IIF), which satisfies the RPF check (RPF-IIF). When the router performs
RPF checks, only the interface that first accepts traffic for an (S,G) pair accepts
subsequent traffic for that pair. If traffic stops coming on that interface and starts
arriving on another interface, the router does not accept or forward the traffic.
Some network configurations require the router to accept traffic on any interface.
To do so, you can disable the RPF check on a specified set of (S,G) pairs by issuing
the ipv6 multicast-routing disable-rpf-check command.
When you disable RPF checks, the router accepts multicast packets for (S,G) pairs
on any incoming interface. When the router has added the new route to its multicast
routing table, it accepts multicast packets for these pairs on any interface in the
virtual router and forwards them accordingly. Multicast routes established before
you issue this command are not affected.
ipv6 multicast-routing disable-rpf-check
152
Enabling and Disabling RPF Checks
Dst Distance configured for this route
Met Learned or configured cost associated with this route
Intf Type of interface and interface specifier for the next hop. For details
about interface types and specifiers, see Interface Types and Specifiers in
JUNOSe Command Reference Guide.
Example 1
host1#show ipv6 rpf-route
Protocol/Route type codes:
O- OSPF, E1- external type 1, E2- external type2,
N1- NSSA external type1, N2- NSSA external type2
L- MPLS label, V- VR/VRF, *- indirect next-hop
Prefix/Length
-------------------------------- --------- ------- --------------------
11:1:1:10::/60
21:2:2:20::/60
31:2:2:20::/60
131:1:1:10::/60
1000::/64
Example 2
host1#show ipv6 rpf-route 1000::/64 detail
1000::/64 Type:Static
NextHop:31:2:2:23::2:3
See show ipv6 rpf-route.
Type Dst/Met
Static 1/0
Static 1/0
Connect 0/0
Connect 0/0
Static 1/0
Distance:1 Metric:0
IntfIndex 18 Intf ATM2/0.300
Intf
ATM2/0.300
ATM2/0.300
ATM2/0.300
ATM2/1.1300
ATM2/0.300