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Routes Fail to Be Learned After an NE40E Is Interconnected with a Cisco

Publication Date:  2019-04-22 Views:  13 Downloads:  0
Issue Description

Routes fail to be learned when an OSPF neighbor relationship is established between an NE40E's broadcast Ethernet link and Cisco device's Ethernet P2P link.

Alarm Information

1. Change the network type of the AR11 interface to P2P. It is found that an OSPF peer relationship is set up.

Handling Process

1. Change the network type of the AR11 interface to P2P. It is found that an OSPF peer relationship is set up.


2. Check that the OSPF neighbor status is Full.

3. Check that no routes destined for the loopback interface of the peer device exists.

4. Check the OSPF LSDB information. It is found that the IP address 12.12.12.12 exists, but no routes destined for this IP address are generated.

 

5. Check that the OSPF link type is P2P on the interface. Therefore, the interface fails to perform SPF calculation for route generation.

6. Check the LSDB information on both ends. It is found that the LSDB configurations on both ends are inconsistent and the network LSA of the broadcast network is missing.

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Root Cause

The OSPF link types on both ends are inconsistent, causing a failure to write routes into the routing table.

Solution

Change the OSPF link type of the peer device interface to be the same as that of the local device interface.

Suggestions

It is recommended that network engineers improve their technical skills and network deployment capabilities.

END