[Xorp-users] host routes, proxy arp and multicast

Ilya Ovchinnikov ilya at psn.ru
Tue Nov 9 02:31:03 PST 2010


Hi All!

We operate a network with central router (linux), many vlan's and a lot of host routes:

% ip r l
10.0.0.2 dev vlan823  proto static  scope link  src 10.0.0.1
10.0.0.4 dev vlan908  proto static  scope link  src 10.0.0.1
10.0.0.5 dev vlan532  proto static  scope link  src 10.0.0.1
10.0.0.6 dev vlan901  proto static  scope link  src 10.0.0.1
10.0.0.7 dev vlan535  proto static  scope link  src 10.0.0.1
10.0.0.8 dev vlan624  proto static  scope link  src 10.0.0.1
10.0.0.9 dev vlan509  proto static  scope link  src 10.0.0.1
10.0.0.10 dev vlan605  proto static  scope link  src 10.0.0.1
. . .
10.0.0.34 dev vlan2853  proto static  scope link  src 10.0.0.1
. . .

Proxy-arp is used on the router. No IP address were assigned to vlan### interfaces.

Now we need to set up multicast routing between multicast source on eth5 and all these
vlan's. XORP refuses to work with this configuration - it says:

[ 2010/11/09 12:45:07.110947 TRACE xorp_igmp MLD6IGMP ] mld6igmp_process:  RX
IGMP_V2_LEAVE_GROUP from 10.0.0.34 to 224.0.0.2 on vif vlan2853
[ 2010/11/09 12:45:07.110982 WARNING xorp_igmp MLD6IGMP ] RX IGMP_V2_LEAVE_GROUP from
10.0.0.34 to 224.0.0.2 on vif vlan2853: source must be directly connected

Can anybody please suggest a solution without total renumbering?

With best regads,
Ilya Ovchinnikov



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