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Cisco Bug: CSCvs86544 - Summary Net Link States metric length with length 24bit is truncated to 16bit

Last Modified

Sep 02, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

In the OSPF configuration we allow to set 24bit metric (setting up metric for default route advertisement into an Area), but then in the Summary Net Link States advertisement we send it out truncated to 16bit.

RP/0/RP0/CPU0:XR701-router(config)#router ospf ACCESS
RP/0/RP0/CPU0:XR701-router(config-ospf)# area
RP/0/RP0/CPU0:XR701-router(config-ospf-ar)#default-cost ?
  <1-16777215>  Stub's advertised external route metric
RP/0/RP0/CPU0:XR701-router(config-ospf-ar)#default-cost 100000   <<<<<<<<

RP/0/RP0/CPU0:XR701-router#show ospf database summary self-originate
            OSPF Router with ID ( (Process ID ACCESS)
                Summary Net Link States (Area
  LS age: 2
  Options: (No TOS-capability, DC)
  LS Type: Summary Links (Network)
  Link State ID: (Summary Network Number)
  Advertising Router:
  LS Seq Number: 80000005
  Checksum: 0x2def
  Length: 28
  Network Mask: /0
        TOS: 0  Metric: 34464  <<<<<<<<

Metric configured is greater than 65535.
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