North American Network Operators Group|
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Re: inter-domain link recovery
On Aug 15, 2007, at 12:06 AM, Chengchen Hu wrote:
I find that the link recovery is sometimes very slow when failure occures between different ASes. The outage may last hours. In such cases, it seems that the automatic recovery of BGP-like protocol fails and the repair is took over manually.
Why do you think BGP was supposed to find the remaining path? Is it possible that the remaining fibers were not owned or leased by the networks in question? Or are you suggesting that any capacity should be available to anyone who "needs" it, whether they pay or not?
BGP cannot find a path that the business rules forbid.
-- TTFN, patrick
2. What is the actions a network operator will take when such failures occures? Is it the case like that, 1)to find (a) alternative path(s); 2)negotiate with other ISP if need; 3)modify the policy and reroute the traffic. Which actions may be time consuming?