Routing

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 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??/

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.

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                 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_

 

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".

 

ohhh..... thats great...

 

thanks alot bro....thanks man

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

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.

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

Hi Folks,

There is a KB documenting the same,

 

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

 

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