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  • 1.  EX3300 interconnect Cisco 1900 Router issues

    Posted 07-22-2014 10:02

    I apologize if the issue seems simple or is clarified in another post on this forum. I’m extremely new to Juniper and JunOS. I’ve recently been tasked with bringing my company’s first Juniper device online. I was very pleased with the amount of documents available from Juniper on configuration especially the “DayOne” books. However after reading several items  online I‘m still having an issue and I could use some help. I can’t reach (ping) the VLAN1 L3 interface on the EX330 over my MPLS network. I can reach the router so I know the WAN is up. I’m currently connecting an EX3300 running 12.3 to a Cisco 1900 series ISR. Port ge0/0/47 on the EX3300 is setup as a trunk port. I believe I have correctly set the member vlans and the native valn on the trunk. The Cisco is running “encap dot1q 1 native” on a sub interface of its GE0/0 port. I will eventually have to run a voice vlan over this network hence the “sub int” on the router. The router see’s the switch’s VLAN1 L3 int address in the ARP table and it’s ping-able. The switch can ping the router so I’m guessing I have a trunking issue as I’ve read this is one area the two device don’t play nice due to Cisco’s use of proprietary protocols.  Please let me know if you need to see more of the config to help. Thank you in advance.

     

    Cisco uplink config:

    Interface GigabitEthernet0/0.1

     encapsulation dot1Q 1 native

     ip address xx.xx.251.1 255.255.255.0

     

    JunOS: v12.3

    Uplink ge-0/0/47.0

    ***********@600-EX3300-01> show interfaces ge-0/0/47

    Physical interface: ge-0/0/47, Enabled, Physical link is Up

      Interface index: 176, SNMP ifIndex: 594

      Link-level type: Ethernet, MTU: 1514, Speed: Auto, Duplex: Auto,

      BPDU Error: None, MAC-REWRITE Error: None, Loopback: Disabled,

      Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled,

      Remote fault: Online, Media type: Copper,

      IEEE 802.3az Energy Efficient Ethernet: Disabled

      Device flags   : Present Running

      Interface flags: SNMP-Traps Internal: 0x4000

      Link flags     : None

      CoS queues     : 8 supported, 8 maximum usable queues

      Current address: 84:b5:9c:35:a2:32, Hardware address: 84:b5:9c:35:a2:32

      Last flapped   : 2013-06-15 05:26:22 UTC (00:23:22 ago)

      Input rate     : 0 bps (0 pps)

      Output rate    : 0 bps (0 pps)

      Active alarms  : None

      Active defects : None

      Interface transmit statistics: Disabled

     

      Logical interface ge-0/0/47.0 (Index 115) (SNMP ifIndex 597)

        Flags: SNMP-Traps 0x40004000 Encapsulation: ENET2

        Input packets : 2025

        Output packets: 2677

        Protocol eth-switch

          Flags: Trunk-Mode

     

    Sh int terse: modified output

    ge-0/0/47               up    up

    ge-0/0/47.0             up    up   eth-switch

    tap                     up    up

    vlan                    up    up

    vlan.0                  up    up   inet     xx.xx.251.254/24

     

    SH Config: shorted Let me know if you need to see more

    }

        ge-0/0/47 {

            unit 0 {

                family ethernet-switching {

                    port-mode trunk;

                    vlan {

                        members [ 1 all ];

                    }

                    native-vlan-id 1;

    --------------------------------------------------------------

       vlan {

            unit 0 {

                family inet {

                    address 10.7.251.254/24;

                }

            }

        }

    }

    routing-options {

        static {

            route 10.7.251.0/24 next-hop 10.7.251.1;

            route 0.0.0.0/24 next-hop 10.7.251.1;

        }

     

    }

    vlans {

        Data {

            vlan-id 1;

            l3-interface vlan.0;

        }

        Voice {

            vlan-id 107;

        }

        default;

    }

    poe {

        interface all;

    }



  • 2.  RE: EX3300 interconnect Cisco 1900 Router issues
    Best Answer

    Posted 07-22-2014 10:16

    Hi,

     

    As I understand the problem (I can’t reach (ping) the VLAN1 L3 interface on the EX330 over my MPLS network.)

     

    However you are able to ping back-to-back success. Two notes here need to check

     

    1- default route is not configured correctly, it should be 0.0.0.0/0 instead of 0.0.0.0/24

    routing-options {

        static {

            route 10.7.251.0/24 next-hop 10.7.251.1;

            route 0.0.0.0/24 next-hop 10.7.251.1;

        }

     

    }

     

    2- check if you advertising this subnet (10.7.251.0/24) over the MPLS cloud so you can see it in the routing table in the remote branch

     



  • 3.  RE: EX3300 interconnect Cisco 1900 Router issues

    Posted 07-22-2014 10:42

    Thanks Mhariry!! The devil is in the details! Its was the "/24" on the default route tripping me up.