You can prevent this by having a backup default route. The other thing
is if you are n a physical interface or aggregated interface with a vlan
on your upstream's router. If its physical it should stop routing
traffic when it sees the interface down. If not it may keep trying to
send traffic down that interface. BFD can help with this. It will Also
depend on how your provider handles the traffic when the the session
with you terminates. If it will forward it on to your other providers or
not. If your alternate providers are connected closely to you it
shouldn't take to long, but it can take 10-20min for the loss of the
peer to propagate across all global routing tables.
On 4/19/23 9:47 AM, Mark - Myakka Technologies wrote:
We have two circuits coming into our NOC. We peer with 3 different providers
on each circuit. If a circuit fails, BGP will do it's magic and traffic will
start flowing though the surviving circuit.
However, we seemed to get about 5 - 10 minutes of unstable Internet while this
is happening. Is this normal? If not, what can I do to speed up the process?
Is it a function of my routers having to rebuild routes? Will new faster
routers help? Is it a function of timers? Keep-Alive is 30s and hold is at
90s. Should I investigate BFD?
How fast could I expect to get this fail-over to work under best conditions?
Thanks,
Mark mailto:m...@mailmt.com
Myakka Communications
www.Myakka.com
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