Re: IOS XR PEs not advertising routes learned from CE1 to CE2

Default behaviour as far as I can tell.
It's better right?
Conserve bandwidth :) but an arse to figure out for the first time!

--
BR
Tony
> On 22 Jun 2014, at 22:07, kumar yes <2014ccie_at_gmail.com> wrote:
> 
> Hell All,
> 
> In my GNS3 LAB, I have enabled MP BGP to send L3 routes between Customer
> router 1 and customer Router 2 using BGP as PE-CE Protocol.
> 
> PEs running AS 100  running IOS-XR
> CEs running AS 80  running IOS
> 
> I also configured RPL with PASS statement under EBGP sessions both in and
> out.
> 
> THE issue is I donbt see that PEs advertising any routes that received from
> the CE1 to CE2 and vise versa
> 
> I know that the routes will be discarded on CE end if it receives prefix
> from same AS (80) but in this case the PEs not advertising the routes to CE
> but when I configure  as override under EBGP neighbor on PEs then the PEs
> started adveristing routes to CEs.
> 
> I did the same on  PEs running IOS and i see PEs adveriting routes to CEs
> (without any additional configuration) and CE discarded the route as
> expected.
> 
> --------------------------------------------------------------
> 
> RP/0/0/CPU0:PE1#show bgp vrf CUST1 neighbors 192.168.1.9 routes
> Sun Jun 22 14:02:09.727 UTC
> BGP VRF CUST1, state: Active
> BGP Route Distinguisher: 1111:1111
> VRF ID: 0x60000002
> BGP router identifier 33.33.33.33, local AS number 100
> BGP table state: Active
> Table ID: 0xe0000002   RD version: 105
> BGP main routing table version 105
> Status codes: s suppressed, d damped, h history, * valid, > best
>              i - internal, r RIB-failure, S stale, N Nexthop-discard
> Origin codes: i - IGP, e - EGP, ? - incomplete
>   Network            Next Hop            Metric LocPrf Weight Path
> Route Distinguisher: 1111:1111 (default for vrf CUST1)
> *> 9.9.9.9/32         192.168.1.9              0             0 80 i
> 
> ----------------------------------------------
> RP/0/0/CPU0:PE1#show bgp vrf CUST1 neighbors 172.168.2.5 advertised-routes
> Sun Jun 22 14:01:44.099 UTC
> 
> *RP/0/0/CPU0:PE1#show bgp vrf CUST1 neighbors 172.168.2.5*
> Sun Jun 22 14:05:53.371 UTC
> 
> BGP neighbor is 172.168.2.5, vrf CUST1
> Remote AS 80, local AS 100, external link
> Remote router ID 5.5.5.5
>  BGP state = Established, up for 01:37:05
>  Last read 00:00:12, Last read before reset 00:00:00
>  Hold time is 180, keepalive interval is 60 seconds
>  Configured hold time: 180, keepalive: 60, min acceptable hold time: 3
>  Last write 00:00:00, attempted 19, written 19
>  Second last write 00:01:00, attempted 19, written 19
>  Last write before reset 00:00:00, attempted 0, written 0
>  Second last write before reset 00:00:00, attempted 0, written 0
>  Last write pulse rcvd  Jun 22 14:05:41.332 last full not set pulse count
> 223
>  Last write pulse rcvd before reset 00:00:00
>  Socket not armed for io, armed for read, armed for write
>  Last write thread event before reset 00:00:00, second last 00:00:00
>  Last KA expiry before reset 00:00:00, second last 00:00:00
>  Last KA error before reset 00:00:00, KA not sent 00:00:00
>  Last KA start before reset 00:00:00, second last 00:00:00
>  Precedence: internet
>  Enforcing first AS is enabled
>  Multi-protocol capability received
>  Neighbor capabilities:
>    Route refresh: advertised (old + new) and received (old + new)
>    4-byte AS: advertised
>    Address family IPv4 Unicast: advertised and received
>  Received 118 messages, 0 notifications, 0 in queue
>  Sent 110 messages, 0 notifications, 0 in queue
>  Minimum time between advertisement runs is 0 secs
> 
> For Address Family: IPv4 Unicast
>  BGP neighbor version 105
>  Update group: 0.1 Filter-group: 0.4  No Refresh request being processed
>  Route refresh request: received 4, sent 4
> 
> *  Policy for incoming advertisements is CUST1  Policy for outgoing
> advertisements is CUST1*
>  1 accepted prefixes, 1 are bestpaths
>  *Cumulative no. of prefixes denied: 0.*
>  Prefix advertised 8, suppressed 11, withdrawn 4
>  Maximum prefixes allowed 1048576
>  Threshold for warning message 75%, restart interval 0 min
>  My AS number is allowed 3 times in received updates
>  An EoR was not received during read-only mode
>  Last ack version 105, Last synced ack version 0
>  Outstanding version objects: current 0, max 2
>  Additional-paths operation: None
> 
> 
> 
> 
> Is IOS-XR behaving right and needs special treatment here?
> 
> 
> 
> 
> Thanks and appreciate your response
> 
> 
> Is IOS-XR behaving right or does it need any special treatment here?
> 
> Thanks and appreciate your response
> 
> 
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