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sh ip route shows 10.0.0.0/8 is variably subnetted

mahesh18
Level 6
Level 6

Hi all,

Router A

sh run int loopback 1

Building configuration...

Current configuration : 63 bytes

!

interface Loopback1

ip address 10.10.0.1 255.255.255.0

sh ip int brief

Loopback1                  10.10.0.1       YES NVRAM  up                    up

Loopback2                  10.10.1.1       YES NVRAM  up                    up

Loopback3                  10.10.2.1       YES NVRAM  up                    up

Loopback4                  10.10.3.1       YES NVRAM  up                    up

Router B  i did sh ip route and it shows

     10.0.0.0/8 is variably subnetted, 10 subnets, 3 masks???????????????????????????????

D EX    10.10.0.0/24 [170/26137600] via 10.1.24.2, 11:18:01, Serial0/0?????????????????????

D EX    10.10.1.0/24 [170/26137600] via 10.1.24.2, 11:18:02, Serial0/0

D EX    10.10.2.0/24 [170/26137600] via 10.1.24.2, 11:18:02, Serial0/0

D EX    10.10.3.0/24 [170/26137600] via 10.1.24.2, 11:18:02, Serial0/0

Can someone please explain me why 10.0.0.0/8 shows in router Bs   routing table.

seems it is using default subnet mask of class A.

Is it default behaviour to show default subnet mask of classless routing protocol?

But it shows also more specfic routes loopback address  from router A  like 10.10.3.0/24 .

We are using classless routing protocol which is EIGRP.

Thanks

mahesh

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