From: Michel GASPARD (mgaspard@xxxxxxxxx)
Date: Thu Apr 19 2001 - 12:44:37 GMT-3
Justin,
You are right, RIPv1 packets do not support VLSM, meaning that there is
no mask information in the RIP messages, but there are some tricks in
the RIP process on the routers.
RIP support classful routes (should be /16 for your 137.1.0.0 network),
but also subnet, if there is a connected interface with non-classful
mask (the /24 you see in your RT, coming from your s0/0, 137.1.50.0/24),
but also /32 host routes.
Try Doyle, pp. 196-204 for more in-depth info.
It says (p 198):
"IP Address is the address of the destination of the route. This entry
may be a major network address, a subnet, or a host route"
Regards,
Michel
"Dean, Justin" wrote:
>
> I ran into something that seemed odd to me. I am running RIP ver 1 and I am
> getting "Network 137.1.0.0 is variable subnetted, 11 subnets, 2 Masks" I
> thought that Rip V1 did not support vlsm any way, shape, or form. Can
> someone shed some light on this. Thanks, justin
>
> ----ospf----R2----rip v1------R1---rip---
>
> R1's ip routes:
>
> C 192.168.123.0/24 is directly connected, FastEthernet0/1
> 1.0.0.0/32 is subnetted, 1 subnets
> C 1.1.1.1 is directly connected, Loopback100
> 137.1.0.0/16 is variably subnetted, 11 subnets, 2 masks
> R 137.1.11.1/32 [120/6] via 137.1.50.2, Serial0/0
> R 137.1.10.0/24 [120/6] via 137.1.50.2, Serial0/0
> R 137.1.12.0/24 [120/6] via 137.1.50.2, Serial0/0
> R 137.1.13.0/24 [120/6] via 137.1.50.2, Serial0/0
> R 137.1.6.6/32 [120/6] via 137.1.50.2, Serial0/0
> R 137.1.4.4/32 [120/6] via 137.1.50.2, Serial0/0
> R 137.1.3.3/32 [120/6] via 137.1.50.2, Serial0/0
> R 137.1.2.2/32 [120/6] via 137.1.50.2, Serial0/0
> C 137.1.1.0/24 is directly connected, Loopback0
> R 137.1.5.0/24 [120/1] via 137.1.50.2, Serial0/0
> C 137.1.50.0/24 is directly connected, Serial0/0
> S* 0.0.0.0/0 [1/0] via 192.168.123.254
>
> Justin M. Dean, CCNP, CCDP
> Network Engineer
> NRT, Incorporated
> (949)367-3438
> justin.dean@nrtinc.com
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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