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  • 1.  Uplink between 8325 JL479A and 6300M JL661A with OSPF

    Posted Aug 15, 2023 01:56 AM

    I have an 8325 JL479A that I am configuring an uplink to a 6300M JL661A.

    I have everything set up and configured, but when I try to ping between the two of them I get no response. The first configuration is on the 8325. I am using OSPF. 

    vlan 100
        description OSPF Transit VLAN for switch B to switch A
    interface 1/1/7
        description switch B to Switch A
        no shutdown
        mtu 9198
        lag 100
    interface lag 100
        description switch B to switch A
        no shutdown
        no routing
        vlan trunk native 1
        vlan trunk allowed all
        lacp mode active
    interface vlan 100
        description OSPF Transit VLAN for switch B to switch A
        ip mtu 9198
        ip address 192.168.1.1/31
        ip ospf 1 area 0.0.0.10
        no ip ospf passive
        ip ospf network point-to-point
    router ospf 1
        router-id 1.1.1.1
        passive-interface default
        graceful-restart restart-interval 300
        redistribute connected
        area 0.0.0.0
        area 0.0.0.10
    This is the configuration of the 6300M:
    vlan 100
        description OSPF Transit VLAN for switch A to switch B
    interface 1/1/52
        no shutdown
        mtu 9198
        description switch A to switch B
        lag 100
        exit
    interface lag 100
        no shutdown
        description switch A to switch B
        no routing
        vlan trunk native 1
        vlan trunk allowed all
        lacp mode active
    interface vlan 100
        description OSPF Transit VLAN for switch A to switch B
        ip mtu 9198
        ip address 192.168.1.2/31
        ip ospf 1 area 0.0.0.10
        ip ospf network point-to-point
    router ospf 1
        router-id 2.2.2.2
        passive-interface default
        graceful-restart restart-interval 300
        redistribute connected
        area 0.0.0.0
        area 0.0.0.10
    I have changed the IP addresses in the above, but I am not sure what I am missing, I am sure it is something simple... Is there anything that might stick out? 


  • 2.  RE: Uplink between 8325 JL479A and 6300M JL661A with OSPF

    Posted Aug 15, 2023 02:17 AM

    Hi

    can you check whether or not an OSPF neighborship is established ("show ip ospf neighbor")? I guess not ...And can you check whether or not the other side is pingable? Here as well, I guess not ... Also check the output of "show ip route"

    The cause may be your addressing. In VLAN 100 you have on one switch configured 192.168.1.1/31 and on the other one 192.168.1.2/31 ... these ranges do not overlap. So you either should change to 192.168.1.0/31 and 192.168.1.1/31 or change the subnet mask to /30. Otherwise the two routers cannot "see" each other on layer3. 

    Regards,
    Thomas




  • 3.  RE: Uplink between 8325 JL479A and 6300M JL661A with OSPF

    Posted Aug 15, 2023 02:30 AM

    I do not see the neighbors, I did change it to a /30 (double checked with a caluclator to make sure I had the right range). I can ping my servers, but I cannot ping any of the interface vlans on the 8325. I also cannot ping 8.8.8.8...


    Original Message


  • 4.  RE: Uplink between 8325 JL479A and 6300M JL661A with OSPF

    Posted Aug 15, 2023 02:44 AM

    Okay, so before pinging anything, you need to make sure the OSPF neighborship is established and you see the routes in your routing table.

    Can you please share your current configuration and the output of (both routers):

    • show ip int brief
    • show ip ospf neigh
    • show ip ospf inter
    • show ip route

    Regards, Thomas


    Original Message


  • 5.  RE: Uplink between 8325 JL479A and 6300M JL661A with OSPF

    Posted Aug 15, 2023 02:24 AM

    if you are using 192.168.1.2/31 then the other IP address on the same network will be 192.168.1.3/31



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  • 6.  RE: Uplink between 8325 JL479A and 6300M JL661A with OSPF

    Posted Aug 15, 2023 02:42 AM

    thank you, I figured it out.... a blonde moment, I did not have no ip ospf passive on the 6300....


    Original Message


  • 7.  RE: Uplink between 8325 JL479A and 6300M JL661A with OSPF

    Posted Aug 15, 2023 02:45 AM

    Alright, thanks for letting us know.


    Original Message


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