11-20-2011 07:34 AM - edited 03-04-2019 02:20 PM
Hi,
Can any one clarify my doubt , this is regarding EIGRP route advertisements.
Generally EIGRP uses multicast address to advertise subnets to its neighbors. If we have 1 Head office router connected to 4 branch office routers.
And if we don't want to send updates to one of the Branch routers through Multicast address 224.0.0.10, instead of that we want to send it as Unicast .
( All the remaining routers should get updates by multicast address only )
Can we achieve this ? If so how can we do that.
Thanks,
Ajay
11-20-2011 08:03 AM
Hello Ajay,
you need to use neighbor command and you need a dedicated logical interface for that neighbor, if you have a single p2mp interface for all neighbors you should check what happens when using the neighbor command only for that specific neighbor if it overrides the default multicast hello you are fine
see
Hope to help
Giuseppe
11-21-2011 05:47 AM
Thanks,
Can we assume same to OSPF also. We can use neighbor command in OSFP to override multicasting ?
Thanks,
Ajay
11-21-2011 06:35 AM
Hi,
yes you can unicast hellos in OSPF like in EIGRP and this feature is also supported in RIP configs.
this was not created to override multicast but to enable EIGRP or OSPF in networks with no multicast support,
once you configure the neighbour command the router will stop sending but also receiving multicast hellos on the interface configured in the command so it must be configured on both sides in EIGRP.
Regards.
Alain
05-22-2018 01:47 AM
Hi,
You can also use Passive Interface to stop Multicast on interfaces. :)
05-22-2018 11:16 PM
you should passive interface then use neighbor command.
Good luck
05-23-2018 08:48 AM
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