North American Network Operators Group|
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Re: Gigabit Linux Routers
Several different traffic shaping strategies are available, and I think all of them go far beyond "simple".
cons: only 1 route for each network, vrrp failover is not easy to implement with quagga and ospf, no multipath routing
A----(ospf)---B \ / \ / \ / \ / \ / lan1
A and B share 1 virtual ip for lan1 (192.168.0.1/24). problems: *) only 1 ip-net supported (no aliases) *) carp is i bound, carp-dev line openbsd is in development (not shure if already stable) *) if carp switch over: t=0: A is master, has route 192.168.0.1/24 B has route 192.168.0.1/24 via ospf t=1: A goes down, route disappear (need linkstate in ospf) t=2: B carp takes over 192.168.0.1/24 B can not add 192.168.0.1/24 route as it is still known via ospf t=3: B gets update to remove route 192.168.0.1/24 via ospf t=4: 192.168.0.1/24 route has disappeared, failover broken.
with ucarp, some special scripts and source code changed I was able to handle this situation, but not with carp and ospf (at least at freebsd 6.3)
Kind regards, Ingo Flaschberger