We have 4 core routers, each with an independent ISP BGP peer.
Currently we take full tables from each peer. Internally we are running ibgp between our 4 routers.
The issue we are having is that if one router loses its ISP BGP sessions then it has knock on effects to the other routers, namely high cpu and dropped traffic as the routing tables reconverge etc.
In the past the majority of our business has been internet based - providing internet connectivity for customers and hosting services that they would connect to over the internet. We are currently transitioning the business to be predominantly based on conference calling - SIP carrier connections back to our dc’s where we have a number of conference bridges of various forms.
Would you recommend moving to default routes from each external ISP rather than the current full tables we receive?
Core routers are 4 x mx80s. They have plenty of ram to store the tables but they don’t seem to cope very well with the cpu demands of processing said routes in convergence event
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