From: Cezar Fistik (cfistik@moldovacc.md)
Date: Tue May 20 2003 - 12:39:10 GMT-3
Hello group,
I would appreciate if someone could help me with this problem.
There are 2 Cat3550 connected by a layer 2 trunk. On both switches
there are 2 vlans, let's say VLAN_1 and VLAN_2. Each vlan has one vlan
interface configured, as follows:
Cat3350-1
interface vlan 1
ip address 10.1.1.1 255.255.255.0
interface vlan 2
ip address 11.1.1.1 255.255.255.0
Cat3350-2
interface vlan 1
ip address 10.1.1.2 255.255.255.0
interface vlan 2
ip address 11.1.1.2 255.255.255.0
Both switches have ip routing enabled and are running ospf. At this
moment, the routing table on both switches should look something like
this:
10.1.1.0/24 is dirrectly connected
11.1.1.0/24 is dirrectly connected
Now, suppose 2 routers are added to this topology, R1 to VLAN_1 on
Cat3350-1 and R2 to VLAN_2 on Cat3350-2, with the following ip
configurations:
R1
interface eth 0
ip address 10.1.1.3 255.255.255.0
R2
interface eth 0
ip address 11.1.1.3 255.255.255.0
Both routers are running ospf.
The question is how would the routing table on either router look
like? I am interested in what will be the next hop for the network that is
not in rotuer's own vlan. Will there be 2 next hops pointing to both
vlan interfaces, which means load balancing or only one, if so wich
one and why? I would also appreciate a trace output from one rotuer to
the other one.
I don't have 2 Cat3550 so I cannot lab it myself. Hope
someone can help me.
Thanks.
-- Best regards, Cezar mailto:cfistik@moldovacc.md
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