Wired Intelligent Edge

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Bring performance and reliability to your network with the HPE Aruba Networking Core, Aggregation, and Access layer switches. Discuss the latest features and functionality of your switching devices, and find ways to improve security across your network to bring together a mobile-first solution
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2930F and OSPF

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  • 1.  2930F and OSPF

    Posted Nov 05, 2018 11:47 AM

    Hi,

    i want to use my 2930F as OSPF Routers instead of L2 Switches. So i configured OSPF area backbone and on all ports that belong to the routing process. The UL-Ports are tagged vlans because the 2930f can not have L3 Ports and in the vlans the ospf ptp statement is configured with /30 Mask. Everything fine so far BUT i got two routed uplinks so ECMP should happen but in my routing table is every Subnet not twice, just once. The neigbour is the same switch in this case. Currently my routes from the living LAN are all from type external2 because of using mpls and redistribution into bgp but this should not impact ecmp ? Normally i want to see every route twice because i have two links with same speed and conditions ?!

     

    Thanks for suggestions!

     

     

    Config Snippets:

     

    router ospf
       area backbone
       redistribute connected
       redistribute static
       enable
       exit

    vlan 110
       name "transfer"
       tagged 3/49
       ip address 10.20.120.37 255.255.255.252
       ip ospf 10.20.120.37 area backbone
       ip ospf 10.20.120.37 network-type point-to-point
       jumbo
       exit

     

    # sh ip route

     


    as you can see the above vlan 110 snippet is not used in here only the vlan 109 takes place in the table.

                                                                                                                IP Route Entries

      Destination        Gateway         VLAN Type      Sub-Type   Metric     Dist.
      ------------------ --------------- ---- --------- ---------- ---------- -----
      0.0.0.0/0          10.127.127.34   109  ospf      External2  10         110
      10.1.0.0/16      10.127.127.34   109  ospf      External2  10         110
      10.2.0.0/22      10.127.127.34   109  ospf      External2  10         110
      10.3.4.0/22      10.127.127.34   109  ospf      External2  10         110

     

     

    in "other" vendor configs there is a max-path command under the OSPF but this is not in the ArubaOS.


    #2930F


  • 2.  RE: 2930F and OSPF

    Posted Nov 06, 2018 02:19 PM

    Hi,

     

    count of ECMP paths is configured in global config mode by 

    [no] ip load-sharing 2-4

    But that should default to 4.

    Documentation of 2930F is somewhat weird ;-)   (Multicast and Routing Guide)

    But at least it shows an example route table with ecmp for OSPF.

    2018-11-06 20_13_04-16.07 WC Documentation Portfolio.pdf - Adobe Acrobat Reader DC.png

    So it should work...

     

    Maybe you can provide more information? (network chart, sanitized but complete config, ...)

     

    Regards, Jö