From: Roger Huang (rhuang@xxxxxxxxxxx)
Date: Tue Aug 20 2002 - 02:39:39 GMT-3
Hi all,
I have a couple of questions about Doyle Page 739 #2 exercise
1. The solution doyle gave is to add a static route on RtrB
ip route 172.16.1.128 255.255.255.224 e0
I understand that on CCIE R&S test, static route is not allowed. Then
is this solution valid?
2. On RtrA, the OSPF router, I am using the following on its e0
!
interface Ethernet0
ip address 172.16.1.129 255.255.255.240 secondary
ip address 172.16.1.161 255.255.255.240 secondary
ip address 172.16.1.193 255.255.255.240 secondary
ip address 172.16.1.225 255.255.255.240 secondary
ip address 172.16.1.145 255.255.255.240
no ip route-cache
no ip mroute-cache
end
The on RtrB, interface e1, I am trying to summurise the subnets to a /27
net using
(config-if)#ip sum rip 172.16.1.224 255.255.255.224
but if I type one more summary,
(config-if)#ip sum rip 172.16.1.128 255.255.255.224
It shows error
IP-RIP:No summary for 172.16.1.128/27.Summary 172.16.1.224/27
already on interface
Why? 172.16.1.128/27 and 172.16.1.224/27 do not overlap. I believe using
loopback interfaces will solve the problem, but why is this happening?
Thanks.
Roger
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