From: Ahsan Mohiuddin (ahsan.mohiuddin@gmail.com)
Date: Tue Oct 21 2008 - 02:48:27 ARST
Here's the topology:
R1---R3----R4
| |
R5----R6
All links are frame-relay P2P, except R1-R3 which is HDLC serial.
(1) R1 is advertising its Lo0 int (6.6.1.1/24) in RIP. R1 is also running
EIGRP 100 and redistributing RIP into EIGRP 100.
(2) R1 & R3 are EIGRP neighbors over serial link (6.6.13.0/24).
(3) R3 is learning the route to 6.6.1.0/24 via 6.6.13.1:
D EX 6.6.1.0 [170/2425856] via 6.6.13.1, 00:00:02, Serial1/1
R3 is able to ping destination 6.6.1.1:
Sending 5, 100-byte ICMP Echos to 6.6.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/12/32 ms
(4) R3 is advertising this route to its EIGRP 100 neighbors R4 & R5.
At R4:
D EX 6.6.1.0 [170/2937856] via 6.6.34.3, 00:07:26, Serial1/0.43
At R5:
D EX 6.6.1.0 [170/2937856] via 6.6.35.3, 00:01:23, Serial1/0.53
(5) R4, R5, R6 are running in OSPF Area 0. Note that R4 & R5 do not have a
direct link, and both these routers are OSPF neighbors to R6.
(6) Now on R4, we configure redistribution of EIGRP 100 into OSPF. As a
result, R6 learns the route 6.6.1.0/24:
O E2 6.6.1.0 [110/20] via 6.6.46.4, 00:03:06, Serial1/0.64
(7) R6 advertises this route to R5. As a result, R5 removes it original
route (distance 170) and installs O E2 (distance 90) route:
O E2 6.6.1.0 [110/20] via 6.6.56.6, 00:00:01, Serial1/0.56
(8) We configure R5 to redistribute OSPF into EIGRP 100. This causes R3 to
learn an additional path to 6.6.1.0/24:
At R3:
D EX 6.6.1.0 [170/2425856] via 6.6.35.5, 00:01:37, Serial1/0.35
[170/2425856] via 6.6.13.1, 00:01:37, Serial1/1
(9) Now at R3, if we ping 6.6.1.1..
Sending 5, 100-byte ICMP Echos to 6.6.1.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
*TASK*
Ensure that R3 can reach 6.6.1.0/24. Do not disable CEF on R3. Do not create
any tunnels. You are allowed to change IP Addressing on a single link
(subnet) in the topology.
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Sat Nov 01 2008 - 15:35:21 ARST