да, это связано обычно с Full-View таблицей маршрутизации.
Полная таблица всех маршрутов в мире сейчас уже под 300Мб озу занимает, ~44000 маршрутов
но такие сюрпризы у меня и в локальной сети с несколькими сотнями сетями были.
С пира который смотри на мир я получаю только 0.0.0.0/0:
gateway.linet.zp.ua> show ip bgp neighbors 62.221.40.165 routes
BGP table version is 0, local router ID is 194.126.204.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 0.0.0.0 62.221.40.165 0 12883 i
Total number of prefixes 1
Ну и с Украины:
BGP neighbor is 93.178.220.61, remote AS 12883, local AS 34605, external link
BGP version 4, remote router ID 213.130.30.56
BGP state = Established, up for 16:12:18
Last read 22:18:18, hold time is 180, keepalive interval is 60 seconds
Neighbor capabilities:
4 Byte AS: advertised and received
Route refresh: advertised and received(old & new)
Address family IPv4 Unicast: advertised and received
Message statistics:
Inq depth is 0
Outq depth is 0
Sent Rcvd
Opens: 2 2
Notifications: 1 0
Updates: 2 12411
Keepalives: 981 560
Route Refresh: 0 0
Capability: 0 0
Total: 986 12973
Minimum time between advertisement runs is 30 seconds
For address family: IPv4 Unicast
Community attribute sent to this neighbor(both)
Inbound path policy configured
Outbound path policy configured
Route map for incoming advertisements is *SET-PRIO
Route map for outgoing advertisements is *ucomline-out
11590 accepted prefixes
Connections established 2; dropped 1
Last reset 16:12:25, due to User reset
Local host: 93.178.220.62, Local port: 1042
Foreign host: 93.178.220.61, Foreign port: 179
Nexthop: 93.178.220.62
Nexthop global: fe80::215:17ff:fe91:7451
Nexthop local: ::
BGP connection: non shared network
Read thread: on Write thread: off
Ну, в ядре пока так:
[root@odin ~]# netstat -rn | grep "93.178.220.61" | wc -l
11589
... просто не хочется каждый раз делать костыль clear bgp * после перезагрузки