[j-nsp] Matching communities in 'show route receive-protocol bgp' command

[Alexander Shikoff]

On Wed, Jul 06, 2011 at 09:50:55AM -0600, Stacy W. Smith wrote:
> I just tried to replicate your problem (on an old version of JunOS), and the community knob works as expected for me.
> 
> root at j6300> show version 
> Hostname: j6300
> Model: j6300
> JUNOS Software Release [9.3S9]
> 
> root at j6300> show route receive-protocol bgp 192.168.0.1 detail table R1.inet.0                  
> 
> R1.inet.0: 4 destinations, 4 routes (4 active, 0 holddown, 0 hidden)
> * 192.168.200.0/25 (1 entry, 1 announced)
>      Accepted
>      Nexthop: 192.168.0.1
>      AS path: 1 I
>      Communities: 1:1
> 
> root at j6300> show route receive-protocol bgp 192.168.0.1 community 1:1               
> 
> inet.0: 6 destinations, 6 routes (6 active, 0 holddown, 0 hidden)
> 
> __juniper_private1__.inet.0: 4 destinations, 4 routes (2 active, 0 holddown, 2 hidden)
> 
> R1.inet.0: 4 destinations, 4 routes (4 active, 0 holddown, 0 hidden)
>   Prefix		  Nexthop	       MED     Lclpref    AS path
> * 192.168.200.0/25        192.168.0.1                             1 I
> 
>  
> What version of JunOS are you using? What platform?
JunOS 10.3R3.7
Juniper MX80-48T
 
> Can you also provide us with the output 'show route ams-ix.net extensive table World.inet.0'?
minotaur at br1-gdr.ki> show route ams-ix.net extensive table World.inet.0 

World.inet.0: 362220 destinations, 720282 routes (358772 active, 30 holddown, 3907 hidden)
91.200.16.0/22 (2 entries, 1 announced)
TSI:
KRT in-kernel 91.200.16.0/22 -> {77.88.200.133}
Destination class: to-World
Source class: from-World
        *BGP    Preference: 170/-111
                Next hop type: Router, Next hop index: 711
                Next-hop reference count: 760367
                Source: 77.88.200.133
                Next hop: 77.88.200.133 via ge-1/0/1.1252, selected
                State: <Active Ext>
                Peer AS: 21011
                Age: 1w3d 5:47:14 
                Task: BGP_21011.77.88.200.133+56251
                Announcement bits (4): 0-RT 1-KRT 2-rt-export 4-Resolve tree 2 
                AS path: 21011 1200 I
                AS path: Recorded
                Communities: 25372:20480
                Accepted
                Localpref: 110
                Router ID: 88.81.250.22
         BGP    Preference: 170/-101
                Next hop type: Router, Next hop index: 767
                Next-hop reference count: 1743395
                Source: 87.245.247.13
                Next hop: 87.245.247.13 via ge-1/0/0.200, selected
                State: <Ext>
                Inactive reason: Local Preference
                Peer AS:  9002
                Age: 38:51 
                Task: BGP_9002.87.245.247.13+179
                AS path: 9002 1200 I
                Communities: 25372:6 25372:20480
                Accepted
                Localpref: 100
                Router ID: 87.245.225.101

I'm changing communities when importing routes. If call the command with 
'receive-protocol bgp' then the output will differ:
minotaur at br1-gdr.ki> show route ams-ix.net receive-protocol bgp 77.88.200.133 extensive table World.inet.0     

World.inet.0: 362199 destinations, 720243 routes (358775 active, 6 holddown, 3906 hidden)
* 91.200.16.0/22 (2 entries, 1 announced)
     Accepted
     Nexthop: 77.88.200.133
     AS path: 21011 1200 I
     AS path: Recorded
     Communities: 21011:400 21011:6777 21011:64528 31445:400


Now let's try to filter routes by community:

minotaur at br1-gdr.ki> show route ams-ix.net community 25372:20480 table World 

World.inet.0: 362185 destinations, 720235 routes (358767 active, 0 holddown, 3906 hidden)
+ = Active Route, - = Last Active, * = Both

91.200.16.0/22     *[BGP/170] 1w3d 05:50:14, localpref 110
                      AS path: 21011 1200 I
                    > to 77.88.200.133 via ge-1/0/1.1252
                    [BGP/170] 00:41:51, localpref 100
                      AS path: 9002 1200 I
                    > to 87.245.247.13 via ge-1/0/0.200

It works.

Now let's try to filter routes but with 'receive protocol bgp' options:
minotaur at br1-gdr.ki> show route ams-ix.net receive-protocol bgp 77.88.200.133 extensive table World.inet.0 community 21011:64528 

- empty output.

For some strange reason filtering by community does not work for me with 'receive protocol bgp'
option.

-- 
MINO-RIPE