we have configured RIP on our Nexus 9508 switches.running NXOS: version 7.0(3)I2(2a)
The RIP config is to support an IBM mainframe that uses RIP and connects to the 9508 via OSA cards and a single layer 3 interface.
The config includes the "default-information originate always" command to include a default route.
router rip 10
metric direct 0
address-family ipv4 unicast
default-information originate always
When this config was applied we received all of the RIP routes that we expected from the mainframe but the mainframe did not see the default route that we were meant to be offering to it.
We therefore shut down the layer 3 interface to the mainframe to back out the change.
We still see the default route as the only entry in the RIP routing table on the 9508.
sh ip rip ro
Process Name "rip-10" VRF "default"
RIP routing table
> - indicates best RIP route
>0.0.0.0/0 next-hops 1
via 0.0.0.0, metric 0, tag 0, redistributed route
My question is will the default route be offered to the mainframe with the config we have applied or do we need to add a redistribution statement that redistributes at least one route into RIP to allow the default route to be included?
This is the from the nexus config guide.
Configuring Route Redistribution
You can configure RIP to accept routing information from another routing protocol and redistribute that information through the RIP network. Redistributed routes can optionally be assigned a default route.
BEFORE YOU BEGIN
You must enable RIP (see the “Enabling RIP” section).
Configure a route map before configuring redistribution. See the“Configuring Route Maps” section for details on configuring route maps.
SUMMARY STEPS
3.
address-family ipv4 unicast
4. redistribute { bgp as | direct | eigrp | isis | ospf | ospfv3 | rip } instance-tag | static } route-map map-name
5. (Optional) default-information originate [ always ] [ route-map map-name ]
