Background: Two lines used by our company, one of which is the MPLS line of telecommunications, we need to pass the route to the BGP route of the telecom, and the BGP routing protocol of the telecom is transmitted to the corresponding routing table of the headquarters.
Suddenly the telecom MPLS line was broken, and then NETCARE called to report the failure. I thought the fiber was broken and let NETCARE arrange the hunt. After a while, the mail came over and said that the routing entries we posted exceeded the limit. Normally we can only publish a maximum of 20.
I first connected to the company’s core switch to see the routing release.
Show IP route EIGRP 1
I feel that there is no abnormal routing release.
Show IP EIGRP nei
Look at the establishment of the telecom EIGRP1 that is directly connected to me. The status is as follows:
*Apr 4 00:43:27.599 GMT: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.183.249 (GigabitEthernet1/0/1) is down: holding time expired BGP neighbor routing entries exceede
Clear IP EIGRP nei
Re-establishing a neighbor, the result is useless.
Because the console is on the router of the computer, there is also an EIGRP1 process running there.
At this time, I started to code people. The people who were looking for telecommunications, they logged into their own equipment, anyway, it was a check. There were not a few orders. Later, they found that their device and my core connected device port became half-duplex.
They enter the interface
In fact, the phenomenon that gives people is that this line will be broken and will pass. Then just fine. So far, it is said that the number of BGP neighbor routing entries exceeds this limit.
Dealing with this basic operator, the headache is their change process, you do not know who the configuration is, change and will not notify the customer, there is no way.