ipv6 accepted & announcement size upto /48 or longer than /48 ?

root <[email protected]> junosiosxr at gmail.com
Thu Apr 27 13:47:05 UTC 2017


Hi,


Am i right ?

Policy for ipv4 accept and send upto /24
Policy for ipv6 accept and send upto /48


-------------------------------------------------------------

I confused when i checked the ipv6 prefix at route-view and ntt looking
glass.

Example : seem like AS2914 accepted the /64 prefix from AS20940

NTT looking output
Query Results:
Router: Ashburn, VA - US
Command: show bgp ipv6 unicast 2001:418:1401:9::


BGP routing table entry for 2001:418:1401:9::/64
Versions:
  Process           bRIB/RIB  SendTblVer
  Speaker           64282538    64282538
Last Modified: Oct 12 13:27:02.644 for 28w1d
Paths: (1 available, best #1)
  Advertised to update-groups (with more than one peer):
    0.10 0.28 0.38 0.39 0.40 0.49
  Advertised to peers (in unique update groups):
    2001:418:0:5000::9bd
    2001:418:0:5000::1b7
    2001:418:0:5000::fc3
    2001:418:0:5000::5b1
  Path #1: Received by speaker 0
  Advertised to update-groups (with more than one peer):
    0.10 0.28 0.38 0.39 0.40 0.49
  Advertised to peers (in unique update groups):
    2001:418:0:5000::9bd
    2001:418:0:5000::1b7
    2001:418:0:5000::fc3
    2001:418:0:5000::5b1
  20940 20940
    2001:418:0:5000::419 (metric 5010) from  (129.250.0.117)
      Origin IGP, metric 0, localpref 120, valid, confed-internal, best,
group-best
      Received Path ID 0, Local Path ID 1, version 64282538
      Community: 2914:370 2914:1009 2914:2000 2914:3000 20940:411



route-view :

2001:418:0:1000::F016
                4         2914  304889   22799 30638084    0    0
1w0d        36959

route-views>show bgp ipv6 un nei 2001:418:0:1000::F016 routes | i /56
 *>  2001:218:200E:100::/56
 *>  2001:218:200E:200::/56
 *>  2001:218:200E:300::/56
 *>  2001:218:200E:400::/56
 *>  2001:218:3003:100::/56
 *>  2001:218:3003:200::/56
 *>  2001:418:141B:200::/56
 *>  2001:418:141F:100::/56
 *>  2001:418:141F:200::/56
 *>  2001:418:1420:200::/56
 *>  2001:418:1427:100::/56
 *>  2001:418:1427:300::/56
 *>  2001:418:142A:100::/56
 *>  2001:418:142A:300::/56
 *>  2001:418:143A:100::/56
 *>  2001:418:143B:100::/56
 *>  2001:418:1446:100::/56
 *>  2001:418:1446:300::/56
 *>  2001:418:1456:200::/56
 *>  2001:418:1456:A00::/56
 *>  2001:418:3801:100::/56
 *>  2001:728:2003:100::/56
 *>  2600:C0B:2:100::/56
 *>  2600:C0B:3010::/56
 *>  2600:C0B:3010:200::/56
 *>  2607:F360:100:100::/56


route-views>show bgp ipv6 un nei 2001:418:0:1000::F016 routes | i /64
 *>  2001:418:1401:1::/64
 *>  2001:418:1401:4::/64
 *>  2001:418:1401:7::/64
 *>  2001:418:1401:9::/64
 *>  2001:418:1401:E::/64
 *>  2001:418:1401:F::/64
 *>  2001:418:1401:98::/64
 *>  2001:418:1C01:1::/64
 *>  2001:418:3801:3::/64
 *>  2001:728:1808:3::/64
 *>  2001:728:1808:4::/64
 *>  2001:7F8:F::/64  2001:418:0:1000::F016
 *>  2001:DF0:1E:4000::/64
 *>  2001:DF5:B400::/64
 *>  2400:8B00:1000:2::/64
 *   2400:8B00:1100:1::/64
 *>  2400:ED00::/64   2001:418:0:1000::F016
 *>  2401:2700:1::/64 2001:418:0:1000::F016
 *>  2407:0:0:1::/64  2001:418:0:1000::F016
 *>  2407:0:0:2::/64  2001:418:0:1000::F016
 *   2407:0:0:4::/64  2001:418:0:1000::F016
 *>  2407:0:0:A::/64  2001:418:0:1000::F016
 *>  2407:0:0:12::/64 2001:418:0:1000::F016
 *>  2407:0:1000:4::/64
 *>  2407:0:1000:8::/64
 *>  2607:3E80::/64   2001:418:0:1000::F016
 *>  2607:3E80:0:1::/64
 *>  2607:3E80:0:2::/64
 *>  2607:3E80:0:3::/64
 *>  2607:3E80:0:4::/64
 *>  2607:3E80:0:5::/64
 *>  2607:3E80:0:6::/64
 *>  2620:116:B097::/64
 *>  2801:80:E0:1800::/64
 *>  2801:80:E0:1801::/64
 *>  2804:14C:5FF9:3::/64
 *>  2804:14C:5FF9:8::/64
 *>  2804:14C:87F9:D::/64
 *>  2804:14C:87F9:E::/64
 *>  2804:14C:9D10:672::/64
 *>  2804:14C:DEFF:1::/64
 *>  2804:14C:DEFF:4::/64
 *>  2804:14D:10F9:1::/64
 *>  2804:14D:16F9:5::/64
 *>  2804:14D:2AF9:2::/64
 *>  2804:14D:3CF9:4::/64
 *>  2804:14D:5CF9::/64
 *>  2804:14D:5CF9:1::/64
 *>  2804:14D:5CF9:4::/64
 *>  2804:14D:5CF9:5::/64
 *>  2804:14D:5CF9:6::/64
 *>  2804:14D:5CF9:A::/64
 *>  2804:14D:5CF9:B::/64
 *>  2804:14D:5CF9:C::/64
 *>  2804:14D:90F9:5::/64
 *>  2804:14D:A210:672::/64
 *>  2804:14D:A211:672::/64
 *>  2804:138B:B040:A2::/64
 *>  2804:138B:C040:A2::/64
 *>  2A00:5400:3000::/64
 *>  2A02:B60::/64    2001:418:0:1000::F016
 *>  2A02:B60:0:F::/64
 *>  2A02:B60:2000:3::/64


*>  2001:418:1401:9::/64
                       2001:418:0:1000::F016
                                            10631             0 2914 20940
20940 i

route-views>show ipv6 route 2001:418:1401:9::/64 longer-prefixes
IPv6 Routing Table - default - 41191 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, R - RIP, H - NHRP, I1 - ISIS L1
       I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
       EX - EIGRP external, ND - ND Default, NDp - ND Prefix, DCE -
Destination
       NDr - Redirect, O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1
       OE2 - OSPF ext 2, ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
       la - LISP alt, lr - LISP site-registrations, ld - LISP dyn-eid
       a - Application
B   2001:418:1401:9::/64 [20/10631]
     via 2001:418:0:1000::F016



best regards



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