Re: [apnic-talk] Issue with ISC F root IPv6 routing in Chennai

Hi Anurag,

Good to know ISC withdrawn the announcements and thanks for your email. 
I will follow up with ISC for a response.

Regards
Sunny

On 5/07/2017 5:29 PM, Anurag Bhatia wrote:
> Hi Sunny
> 
> 
> Thanks for the message. While no one from ISC replied, I see they have 
> acted by withdrawing announcements.
> 
> 
> |2001:de8:1:2::3 24049 ESTAB 35d22h56m 0 0 2314 0 2001:de8:1:2::4 24049 
> ESTAB 136d14h17m 0 0 2314 0 |
> 
> 
> 
> I hope ISC has an arrangement on IPv6 transit at NIXI (just like they 
> would have for IPv4) since people around routes partially at NIXI to 
> balance off traffic.
> 
> 
> On Sat, Jun 24, 2017 at 5:32 PM, Srinivas Chendi <[email protected] 
> <mailto:[email protected]>> wrote:
> 
>     Hi Anurag
> 
>     Forwarded your email to ISC team. Hope they will look into this soon.
> 
>     Sunny
> 
> 
> 
>     Sent from my Samsung Galaxy smartphone.
> 
> 
>     -------- Original message --------
>     From: Anurag Bhatia <[email protected] <mailto:[email protected]>>
>     Date: 24/06/2017 21:53 (GMT+10:00)
>     To: SANOG <[email protected] <mailto:[email protected]>>,
>     mailman_APNIC-talk <[email protected] <mailto:[email protected]>>
>     Subject: [apnic-talk] Issue with ISC F root IPv6 routing in Chennai
> 
>     Hello,
> 
> 
> 
>     Anyone here from NIXI or ISC?
> 
> 
>     I see there's a consistent issue with IPv6 for F root anycast
>     instance in Chennai hosted at NIXI - *2001:500:2f::f*
> 
> 
> 
>     Inline image 1
> 
> 
> 
> 
> 
> 
> 
> 
>     If I trace it from the RIPE Atlas anchor, I get following:
> 
>     Probe #6107
> 
>        1 2401:7500:fff0:1::1                      0.838 ms     0.747 ms
>          0.632 ms
>        2 2400:5200:1c00:d::1                      1.755 ms     1.745 ms
>          1.726 ms
>        3 2403:0:100::2be                          2.089 ms     2.054 ms
>          2.049 ms
>        4 2404:a800:2a00::13d                     45.589 ms    26.274 ms
>          33.64 ms
>        5 2404:a800::178                          26.376 ms    25.406 ms
>         25.276 ms
>     6 2001:de8:1:2::3                         25.363 ms    25.232 ms  
>       25.223 ms
>        7 *                                               *            *
>                 *
>        8 *                                               *            *
>                 *
>        9 *                                               *            *
>                 *
>       10 *                                               *            *
>                 *
>       11 *                                               *            *
>                 *
> 
> 
> 
> 
>     6th hop is ISC's router on NIXI Chennai peering fabric
>     (2001:de8:1:2::/64).  Clearly, there's an issue in return path and
>     possibly setup is either without default or misconfigured IPv6 or
>     partial table.
> 
> 
> 
> 
> 
> 
>     on "sh bgp ipv6 sum" on NIXI Chennai route server, it gives:
> 
>       2001:de8:1:2::3           24049       ESTAB   25d 3h10m     1    
>            0        2263     0
>       2001:de8:1:2::4           24049       ESTAB   125d18h30m    1    
>            0        2264     0
> 
> 
> 
> 
> 
>     show ipv6 bgp neighbors 2001:de8:1:2::3 received-routes
>             There are 1 received routes from neighbor 2001:de8:1:2::3
>     Searching for matching routes, use ^C to quit...
>     Status A:AGGREGATE B:BEST b:NOT-INSTALLED-BEST C:CONFED_EBGP D:DAMPED
>             E:EBGP H:HISTORY I:IBGP L:LOCAL M:MULTIPATH
>     m:NOT-INSTALLED-MULTIPATH
>             S:SUPPRESSED F:FILTERED s:STALE
>             Prefix             Next Hop        MED        LocPrf    
>     Weight Status
>     1 2001:500:2f::/48   2001:de8:1:2::3 10         100        0      BE
>               AS_PATH: 24049 3557
> 
> 
>     show ipv6 bgp neighbors 2001:de8:1:2::4 received-routes
>             There are 1 received routes from neighbor 2001:de8:1:2::4
>     Searching for matching routes, use ^C to quit...
>     Status A:AGGREGATE B:BEST b:NOT-INSTALLED-BEST C:CONFED_EBGP D:DAMPED
>             E:EBGP H:HISTORY I:IBGP L:LOCAL M:MULTIPATH
>     m:NOT-INSTALLED-MULTIPATH
>             S:SUPPRESSED F:FILTERED s:STALE
>             Prefix             Next Hop        MED        LocPrf    
>     Weight Status
>     1 2001:500:2f::/48   2001:de8:1:2::4 10         100        0      E
>               AS_PATH: 24049 3557
> 
> 
> 
> 
> 
> 
>     One should possible stop this BGP announcement until return path
>     issue is fixed.
> 
> 
> 
>     Thanks.
> 
>     -- 
> 
> 
>     Anurag Bhatia
>     anuragbhatia.com <http://anuragbhatia.com>
> 
> 
> 
> 
> -- 
> 
> 
> Anurag Bhatia
> anuragbhatia.com <http://anuragbhatia.com>

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