[All About Switches] Routes Cannot Be Advertised Because the Number of Interfaces Exceeds the Upper Limit on a Single OSPF Process

Latest reply: Jun 3, 2018 13:56:28 1340 2 0 0

Involved Products and Versions

All models and versions

Networking

None

Fault Symptom

Some OSPF routing information of the switch is not advertised to the peer device.

Cause Analysis

On a single process, the number of OSPF interfaces exceeds the upper limit. As a result, routes that exceed the upper limit cannot be advertised.

Troubleshooting Procedure

1.         Log in to the switch, and run the display ospf cumulative command in any view to check OSPF statistics.

<HUAWEI> display ospf cumulative
 
 OSPF Process 1 with Router ID 67.220.175.130
 Cumulations 
  IO Statistics
             Type        Input     Output
            Hello         1368       1341
   DB Description           15         18
   Link-State Req            0         10
Link-State Update         1515       1810
   Link-State Ack          814        813
  ASE: 45 Checksum Sum: 3563841
  LSAs originated by this router
  Router: 1
  Network: 0
  Sum-Net: 0
  Sum-Asbr: 0
  External: 1
  NSSA: 0
  Opq-Link: 0
  Opq-Area: 0
  Opq-As: 0
  LSAs Originated: 2  LSAs Received: 8134
  Routing Table: 
    Intra Area: 1766  Inter Area: 844  ASE: 45 
  Up Interface Cumulate: 128  //Check the statistics about interfaces in the UP state. The value is displayed 128.
      Neighbor Cumulate:
  =======================================================
      Neighbor cumulative data. (Process 1)
  -------------------------------------------------------
  Down:       0 Init:        0 Attempt:    0 2-Way:    0
  Exstart:    0 Exchange:    0 Loading:    0 Full:     3
  Retransmit Count: 0 
      Neighbor cumulative data. (Total)
  -------------------------------------------------------
  Down:       0 Init:        0 Attempt:    0 2-Way:    0
  Exstart:    0 Exchange:    0 Loading:    0 Full:     3
  Retransmit Count: 0

2.         Run the display ospf interface command in any view to check information about OSPF interfaces.

<HUAWEI> display ospf interface
  OSPF Process 1 with Router ID 67.220.175.130
                  Interfaces
 Area: 0.0.0.0        (MPLS TE not enabled)
 IP Address   Type      State Cost Pri DR            BDR
 192.168.1.2  Broadcast  DR    1    1  192.168.1.2   192.168.1.3
 172.16.0.1   Broadcast  DR    1    1  172.16.0.1    172.16.0.2
......//A total of 180 interfaces are calculated.

3.         Contact Huawei technical support engineers to check the specification. It is found that the number of interfaces supported on a single OSPF process is 128 and the number of interfaces on the current device is 180, which exceeds the upper limit. Check the network, and run the undo ospf enable command on the interface that does not need to be enabled with OSPF to disable the OSPF function.

Conclusions and Suggestions

The number of interfaces configured for a single OSPF process must not exceed the upper limit. For more information, contact Huawei technical support engineers.

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WoodWood
Created Mar 15, 2018 10:05:40 Helpful(0) Helpful(0)

:)
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wissal
MVE Created Jun 3, 2018 13:56:28 Helpful(0) Helpful(0)

useful document, thanks
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Telecommunications%20engineer%2C%20currently%20senior%20project%20manager%20at%20an%20operator%2C%20partner%20of%20Huawei%2C%20in%20the%20radio%20access%20network%20department%2C%20for%2020%20years%20I%20managed%20several%20types%20of%20projects%2C%20for%20the%20different%20nodes%20of%20the%20network.

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