Hello,
I new to bgp and I try to use it but i have some trouble with carp devices
I Have 2 peering, one work great one not
My interfaces :
carp0 => interface with interroute : 212.xxx.xxx.254
carp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
carp: MASTER carpdev em0 vhid 1 advbase 1 advskew 100
groups: carp
inet 212.xxx.xxx.254 netmask 0xfffffffc broadcast 212.xxx.xxx.255
em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
lladdr 00:07:e9:24:aa:38
media: Ethernet autoselect (100baseTX full-duplex)
status: active
inet6 fe80::207:e9ff:fe24:aa38%em0 prefixlen 64 scopeid 0x1
I use carp device because I have only 2 ip's in the subnet (my ip and the
peering router)
em1 => interface with neo : 83.xxx.xxx.109
My bgpd.conf :
--------------------------------------------------------------------
ip_interroute="212.xx.xx.253"
ip_neotelecom="64.xx.xx.148"
neighbor $ip_interroute {
remote-as 8928
descr "peering interroute"
local-address 212.xxx.xxx.254
holdtime 180
holdtime min 3
announce self
}
neighbor $ip_neotelecom {
remote-as 6461
descr "peering NeoTelecom"
local-address 83.xxx.xxx.109
holdtime 180
holdtime min 3
announce self
multihop 3
}
bgp1 # bgpctl sh
Neighbor AS MsgRcvd MsgSent OutQ Up/Down
State/PrefixRcvd
peering NeoTelecom 6461 95342 1027 0 17:04:38 197977
peering interroute 8928 300179 882 0 00:09:41 200898
When I use the carp device the bgp session works, he acquire the complete
routing table.
But ..
bgp1 # bgpctl sh next
Nexthop State
212.xxx.xxx.253 valid
64.xxx.xxx.148 valid em1 UP, Ethernet, active, 100 MBit/s
bgp1 # bgpctl sh interface
Interface Nexthop state Flags Link stater
carp0 ok UP CARP, master
em1 ok UP Ethernet, active, 100 MBit/s
em0 ok UP Ethernet, active, 100 MBit/s
bgp1 # bgpctl show rib 195.68.0.1
flags: * = Valid, > = Selected, I = via IBGP, A = Announced
origin: i = IGP, e = EGP, ? = Incomplete
flags destination gateway lpref med aspath origin
*> 195.68.0.0/17 212.xxx.xxx.254 100 0 8928 8220 i
* 195.68.0.0/17 83.xxx.xxx.106 100 174 6461 8220 i
Now the problem is that the gateway is my self, 212.xxx.xxx.254 is the carp0
IP
If I delete the carp and bring the em0 with the ip up everything works great
:
bgp1 # bgpctl sh next
Nexthop State
212.xxx.xxx.253 valid em0 UP, Ethernet, active, 100 MBit/s
64.xxx.xxx.148 valid em1 UP, Ethernet, active, 100 MBit/s
bgp1 # bgpctl show rib 195.68.0.1
flags: * = Valid, > = Selected, I = via IBGP, A = Announced
origin: i = IGP, e = EGP, ? = Incomplete
flags destination gateway lpref med aspath origin
*> 195.68.0.0/17 212.xxx.xxx.253 100 0 8928 8220 i
* 195.68.0.0/17 83.xxx.xxx.106 100 174 6461 8220 i
Some Idea ?
Regards
Claude
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