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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: UUnet blocking ICMP ECHO for select sources/destinations ?
The observations suggest something different. Remember that I mentioned that this blockage only occurs for a SINGLE IP in my network: the base IP belonging to the server doing the stats collection every 5 minutes. Other IP's (even on that server) are ok. Rate limiting would be visible as packet loss after the committed rate is exceeded: you can't rate-limit on production border routers down to single-host granularity, only a big interface-wide rate-limit will work. I am still trying to determine if the interface IP in question is the customer side of things, but things are a bit murky there, because there appear to be ACLs on both sides of the link. At Wednesday 04:15 PM 6/14/00 , Mufti Ahmed <[email protected]> wrote: > Kai what if UUnet is running some type of QOS mechanism in their >core network that prevents massive amounts of icmp messages >traveling through? Maybe they are rate-limiting everyone with CAR. >Their infrastructure is interesting they use Cisco, Fore, and Juniper >at least in production. And they claim they run an MPLS network; >maybe this is where icmp traffic is killed.. |