Figure 7-9. Network Experiencing an EIGRP Neighbor Problem Because
Mismatched AS Numbers
RTR B#show running-config interface serial 0
IP address 10.1.1.1 255.255.255.0
router eigrp 11 network 10.0.0.0
RTR A#show running-config
Interface serial 0
IP address 10.1.1.2 255.255.255.0
router eigrp 1
You should notice the misconfiguration immediately. RTR B's Serial 0 interface is con-figured to be in EIGRP AS number 11, while RTR A's Serial 0 is configured to be in EIGRP AS number 1. Because the AS numbers don't match across the link, no EIGRP neighbor relationship will be formed. To resolve this problem, simply configure both routers with the same EIGRP AS number, as shown in Example 78. In this example, both routers will be configured to be in EIGRP AS 1.
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