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Is 31 bit mask supported

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TitleIs 31 bit mask supported
Symptoms
  • Unable to assign 31 bit mask ie 255.255.255.254
  • When we try to enter this net mask the system gives an error as invalid ip address.
  • VSP:1(config-if)#ip address 167.112.130.202/31
    Error: Invalid IP address
    
    VSP:1(config-if)#ip address 167.112.130.202 255.255.255.254
    Error: Invalid IP address
  • According to the RFC 3021 there is a possibility to reduce the ip address consumption to 50% by assigning 31 bit subnet mask for a point to point link.

 

Environment
  • ERS
  • VSP
  • All versions
Cause
  • This is feature is not available on the ERS 8600 or VSP switches
Resolution
Additional notes

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