04-03-2004 08:12 PM - edited 03-02-2019 02:46 PM
two questions
first
topology like this
R5--area2--R1--area0--R2--area1--R3--RIPv1--R4
between R1,R2, the netmask is /26
other parts are /24
redistribute OSPF/RIP on R3
now R4 can not ping the ip between R1 and R2 with /26
because in area 0, no ospf summary, so how to ping the ip from R4? for extended ping, the loopback0 of R4 can ping loop0 of R1, and vice-verse, but R1 can not ping R4 with standard ping.
second question for ospf virtual-link
topology like this
R1--area0--R2---area10---R3--area0---R4
do virtual-link on R2 and R3 to connect the two area0
now the qestion is
there are 3 links between R2 and R3, like 10M link, 1.544M link and 64K link, when the virtual-link is up, which link will transfer the traffice between two area0? 10M link?
Thanks
04-04-2004 07:14 AM
Question 1:
You could summarize the /26 in to a /24 into area 1 on R2. This way the /24 would be advertise in RIP. The other option would be to use RIPv2 instead of RIP.
Question 2:
The VL uses the best path (as selected by SPF). Assuming you use the default cost on all the links, the 10M link would carry the traffic between R2 and R3.
Hope this helps,
04-04-2004 08:41 AM
Thanks for reply
It does't work to summarize /26 to /24 into area 1 or area 2.
I tried
area 1 range x.x.x.0 255.255.255.0
I tried
area 0 range x.x.x.0 255.255.255.0
and I tried
summary-address x.x.x.0 255.255.255.0
after that
on other ospf router, the mask still is /26, and on RIPv1 router, no route, so can not ping
04-04-2004 11:37 AM
Did you configure the "default-metric" command under the RIP configuration on R3?
Did you configure the "area 0 range x.x.x.0 255.255.255.0" command on R2?
BTW: The summary-address will only summarize routes redistributed in OSPF (externals).
Hope this helps,
04-04-2004 11:54 AM
Of course, I configure "default-metric=2" under RIP
my real topology is
R1----/26 area0----R2----area1----R3--RIPv1---R5
R1----/26 area0----R4----area10---R3--RIPv1---R5
R1 use sub-interface, same subnet with R2,R4
I use "area 0 range x.x.x.0 255.255.255.0" on R2 and R4, doesn't work
I use "area 1 range x.x.x.0 255.255.255.0" on R2 and use "area 10 range x.x.x.0 255.255.255.0" on R4, doesn't work
R1 and R5 have loopback0, put them into routing protocol, R5 loop0 can ping R1 loop0, vice verse, but R5 can not ping the /26
Do I need "area ? range x.x.x.0 255.255.255.0" on R1?
Thanks
04-04-2004 12:19 PM
I find it really stange that the "area range" command doesn't work. What version of IOS do you run?
Can you do a "sh ip ospf" and "sh ip route" on R2.
Thanks,
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