Hi all
[20051019 snap i386]
I've made a setup with two identical bgp routers. On each router there's
3 peers (BGP and eBGP), one failover (carp/iBGP/ospf) interconnecting
these routers and finally pipes backwards to the internal nets. Part of
bgpd.conf further down.
I'm replacing a single router (no ospf) fbsd/zebra setup.
Q: setting up iBGP I've used our own AS as 'remote-as' but can't find a
'no synchronization' option for this connection. Do I need it at all.
Been poking around in /usr/src/usr.sbin/bgpd without solving it, but
it's needed in zebra and Cisco IOS hence the question.
A: ?
Q: adding md5sig password, how can I activate these stepwise without
having to take bgpd down/up and affecting all connections - ospfctl does
not seem have it as an option. Would like to add md5sig one carrier at a
time on a "live" system.
A: ?
Q: running ospf with all peers + carp intfaces in area 0.0.0.0 and
internal intfaces in area 0.0.0.1 (and from ospfd.conf)
[...]
fib-update yes
redistribute connected
[...]
This is about redistributing routes - will the above let BGP and OSPF
"play along" in the same way a 'redistribute ospf' in Zebra/Cisco IOS
A: ?
Q: default gateway is added to the routing table after all interfaces
are configured. BGP is adding information into the routing table and so
does OSPF (updates). That's 3 times "redistributing" of routes between
different protocols and with 3 different administrative distances but
still in/from the same table. Since directly connected (0) or static (1)
connections are superior to e.g. eBGP (20) and OSPF (110) then should or
shouldn't /etc/mygate be removed from a BGP router before putting it
into production. Will it/can it mock the routing decision despite
'weight' in bgpd.conf due to the lower distance.
A: ?
Part of bgpd.conf:
[...]
neighbor $peer0 {
remote-as ABCD
descr "ebgp sucks"
set nexthop aaa.aaa.aaa.aab
multihop 10
local-address aaa.aaa.aaa.aaa
announce self
announce IPv6 none
enforce neighbor-as yes
set weight 100
#tcp md5sig password HotPotatoes
}
...
...
neighbor $carp {
remote-as <our_own_AS>
descr "internal"
local-address 172.16.0.1
depend on em5
announce all
announce IPv6 none
enforce neighbor-as no
set weight 200
#tcp md5sig password NoPotatoes
}
I have a:
deny from any prefix 172.16.0.0/12 prefixlen >= 12
but the carp interface uses a /8 i.e. should be safe :)
