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IRB interface Problem

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  • 1.  IRB interface Problem

    Posted 05-13-2011 17:40

    Hi All,

     

    I configure IRB interface on a routing instance,,, after that I checked the routing table of the routing instance so I found a route to IRB's ip address with a reject state??? 

     

     

    noc@MX960# show routing-instances NOC 
    instance-type virtual-router;
    interface irb.161;

     

     

     

    noc@MX960# show interfaces irb.161 

    family inet {

        address 172.17.161.254/24;

    }

     

     

     

     

    noc@MX960# run show route table NOC.inet.0 

     

    NOC.inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)

    + = Active Route, - = Last Active, * = Both

     

    172.17.161.254/32   *[Local/0] 01:04:00

                                           Reject

     

     

    the output of the routing table must be indicating that the next-hop via irb.161 which is local, so what is the problem??/



  • 2.  RE: IRB interface Problem

    Posted 05-13-2011 19:44

    It seems that your bridge-domain is not functional ie your irb interface has hardware-down flag set.

    Could you please post the "show interfaces irb"?

    Check if interfaces bounded to bridge-domains are UP.



  • 3.  RE: IRB interface Problem

    Posted 05-14-2011 00:01

    Thanks alot man for your help...

    this is a simple of show commands that can help us:

     

     

    noc@MX960> show interfaces irb.161 terse                  
    Interface               Admin Link Proto    Local                 Remote
    irb.161                 up    down inet     172.17.161.254/24
                                       multiservice

     

    noc@MX960> show interfaces irb.161 terse                  Interface               Admin   Link         Proto    Local                 Remoteirb.161                                                                                                      up         down       inet     172.17.161.254/24                                                                                                                                                                  multiservice

     

     

    noc@MX960> show interfaces irb.161 extensive               

      Logical interface irb.161 (Index 248) (SNMP ifIndex 747) (Generation 451)

        Description: TO: default gateway NOC

        Flags: Hardware-Down SNMP-Traps 0x4004000 Encapsulation: ENET2

        Bandwidth: 1000mbps

        Routing Instance: default-switch Bridging Domain: VLAN_161+161

        Traffic statistics:

         Input  bytes  :                    0

         Output bytes  :                    0

         Input  packets:                    0

         Output packets:                    0

        Local statistics:

         Input  bytes  :                    0

         Output bytes  :                    0

         Input  packets:                    0

         Output packets:                    0

        Transit statistics:

         Input  bytes  :                    0                    0 bps

         Output bytes  :                    0                    0 bps

         Input  packets:                    0                    0 pps

         Output packets:                    0                    0 pps

        Protocol inet, MTU: 1514, Generation: 553, Route table: 17

          Flags: Sendbcast-pkt-to-re, Is-Primary

          Addresses, Flags: Dest-route-down Is-Default Is-Preferred Is-Primary

            Destination: 172.17.161/24, Local: 172.17.161.254, Broadcast: 172.17.161.255, Generation: 318

        Protocol multiservice, MTU: 1514, Generation: 554, Route table: 17

          Policer: Input: __default_arp_policer_

     



  • 4.  RE: IRB interface Problem
    Best Answer

    Posted 05-14-2011 02:24

    OK, than this means that you don't have any active(UP state) logical interfaces assigned to bridge-domain.

    In this case the "Reject" statement as next-hop means that for traffic who's destination is this IP address, router will generate "icmp unreachable".

     



  • 5.  RE: IRB interface Problem

    Posted 05-14-2011 22:29

    ohhh..... thats great...

     

    thanks alot bro....thanks man



  • 6.  RE: IRB interface Problem

    Posted 06-12-2017 14:45

    How did you resolve this? I have the same problem! Thanks in advance 🙂



  • 7.  RE: IRB interface Problem

     
    Posted 06-13-2017 03:04

    One of the physical sub interfaces you have assigned to the IRB group has to be link up.  If they are all link down the IRB will be link down.



  • 8.  RE: IRB interface Problem

    Posted 06-13-2017 05:36
    hi,

    yes i resolved this

    1. upgrade your juniper the lasted version
    2. the subnet of the IRB interface can be recheable by the interface if not
    the interface gone a be down
    3. assign a interface IRB to a VLAN

    i hope this helps

    --
    Johnattan Perez
    Ingeniero de Soporte
    Conian Technology
    Cel.823-344-5868
    Ofic.809-740-8080 Ext.4229,2262


  • 9.  RE: IRB interface Problem

     
    Posted 06-14-2017 00:10

    Hi Folks,

    There is a KB documenting the same,

     

    https://kb.juniper.net/InfoCenter/index?page=content&id=KB26488&actp=METADATA

     



  • 10.  RE: IRB interface Problem

    Posted 10-01-2016 17:11

    hi, do you can explain to me this i have the same problem