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OSPF between and 8320 and 2930F

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  • 1.  OSPF between and 8320 and 2930F

    Posted Jan 24, 2023 07:28 PM
    I am trying to set up an OSPF point to point link between an Aruba 2930F JL261A and an Aruba 8320. Currently I have VLANs with IPs on them so I can ping and check it is all up. I know it is probably something simple I am missing...

    The configuration on the 2930F is as follows:
    configure terminal
    router ospf
    area backbone
    enable exit
    vlan 101
    name "OSPF Link"
    untagged trk27
    ip address 10.255.255.253 255.255.255.252
    ip ospf 10.255.20.253 area backbone
    ip ospf 10.255.20.253 network-type point-to-point
    jumbo
    exit
    *trk27 is a trunk link with LACP that is the interface connecting the two

    On the 8320, I have OSPF configured as follows:
    configure terminal
    router ospf 1
    router-id 1.1.1.1
    passive-interface default
    area 0.0.0.0
    int loopback 0
    ip address 1.1.1.1/32
    ip ospf 1 area 0.0.0.0
    exit
    int 1/1/47
    description OSPF LINK
    no shutdown
    ip addrerss 10.255.255.24 255.255.255.252
    ip ospf 1 area 0.0.0.0
    no ip ospf passive
    ip ospf network point-to-point
    ip ospf authentication message-digest
    ip ospf message-digest key 1 md5 ciphertext
    exit

    The issue I am seeing is that I cannot ping anything other than the point-to-point OSPF IP addresses. I am using J4858D transceivers on both sides across single mode cabling (these are not the same IP addresses I am using). On the 2930F, I have trk27 untagged on vlan 101 and tagged on all my other vlans.


  • 2.  RE: OSPF between and 8320 and 2930F

    EMPLOYEE
    Posted Jan 24, 2023 08:13 PM
    do you have the correct routes being advertised?

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    If my post was useful accept solution and/or give kudos.
    Any opinions expressed here are solely my own and not necessarily that of HPE or Aruba.
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    Original Message


  • 3.  RE: OSPF between and 8320 and 2930F

    Posted Jan 25, 2023 02:40 AM
    Hi, from the config you've posted it looks like you have two IP addresses on VLAN 101 that you want to form an adjacency. The point to point network type is where there is no ambiguity over the IP of the other side and as such the OSPF process can avoid the CPU effort of having DR/BDR etc. It stems from leased lines where there can only be one device at the far end.

    So I'd suggest making this a broadcast OSPF network, even though there are two parties. The Multicast hello will enable them to find each other.

    Also check the MTU is the same on both sides. This is a classic CCNA question for why OSPF doesn't form. Clearly OSPF authentication needs to match.
    Original Message


  • 4.  RE: OSPF between and 8320 and 2930F

    Posted Jan 30, 2023 06:42 PM
    I went back and checked some things; I did change it broadcast from point to point and removed the authentication. I was able to go from the 2930F to the lower 8320 that it is connected to. I think my understanding of VSX is/ was a little off, I think I need a connection from the upper and lower 8320 in the cluster to the 2930F. Attached is a rough topology and my configurations.

    Attachment(s)

    txt
    SF-MDF-SW1-LOWER.txt   3 KB 1 version
    txt
    2930F.txt   702 B 1 version
    txt
    SF-MDF-SW1-UPPER.txt   3 KB 1 version
    Original Message


  • 5.  RE: OSPF between and 8320 and 2930F

    Posted Jan 31, 2023 02:48 AM
    On the 8320 you have 1/1/47 as "uplink" and on 2930F you have a Trk27 which is a LAG interface.  LAG interfaces must be connected to a LAG. 

    If you are going to use SVI interfaces use it on all three devices with a Trk - MCLAG config, or split the Trk and make two interfaces on 2930F side connected to each of the 8320s.

    ------------------------------
    Arne Opdal
    ------------------------------

    Original Message