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Changing MPLS MTU on A5500-HI not possible

MichaelM55
Trusted Contributor

Changing MPLS MTU on A5500-HI not possible

Hello,

 

for MPLS, we have A5500-HI switches and some A5900 switches. On A5500-HI it is not possible to change the MPLS MTU

 

  • HP A5500-48G-4SFP HI with "Comware Software, Version 5.20.99, Release 5501P12"
  • dis interface Vlan-interface 2016
    Vlan-interface2016 current state: UP
    Line protocol current state: UP
    Description: Vlan-interface2016 Interface
    The Maximum Transmit Unit is 1500
  • interface Vlan-interface2016
     ip address 10.20.1.13 255.255.255.254
     ospf network-type p2p
     ospf bfd enable
     mpls
     mpls ldp
    • mpls mtu ?
    • INTEGER<46-65535>  MTU value
  • mpls mtu 9216
  • Warning: Setting MPLS MTU larger than the interface MTU may result in packet drops.
    Error: The operation is not supported.
  • mtu ?
  •   INTEGER<46-1500>  MTU value
=> So maximum values is 1500. Is this a limitation within Comware 5 (which will be fixed within the Comware 7 release for A5500-HI)?

 

 

In contrast

  • HP 5900AF-48XG-4QSFP+ with "System image version: 7.1.045, Release 2418P06"
    interface Vlan-interface2012
     ip address 10.20.1.4 255.255.255.254
     ospf network-type p2p
     ospf bfd enable
     ospf 10 area 0.0.0.0
     mpls enable
     mpls mtu 9216
     mpls ldp enable
  • mtu ?
  •  INTEGER<128-9008>  MTU value (in bytes) 
  • Interesting, this one is possible within Comware 7:
      • interface Vlan-interface2012
         mtu 9008
         ip address 10.20.1.4 255.255.255.254
         ospf network-type p2p
         ospf bfd enable
         ospf 10 area 0.0.0.0
         mpls enable
         mpls mtu 9216
         mpls ldp enable
        • There´s no warning like that one from the A5500-HI, i.e.:
        Warning: Setting MPLS MTU larger than the interface MTU may result in packet drops.
        Error: The operation is not supported.
      • dis interface Vlan-interface 2012
        • Vlan-interface2012
          Current state: UP
          Line protocol state: UP
          Description: Vlan-interface2012 Interface
          Bandwidth: 10000000 kbps
          Maximum transmission unit: 9008
        • dis mpls interface
          • Interface               Status       MPLS MTU
            Vlan2012                Up           9216