Boy do I feel like a dumb*!$# about now...... In an effort to reduce downtime I booted #2 and let it get completely thru the boot process BEFORE switching the wiring around to take #1 down and bring #2 online, AFTER it had already done the ARP broadcast you mention below. I won't get a chance to try it until tomorrow but why do I get the strong feeling that it's gonna work fine when I do? For my own curiosity I'm gonna try what routerman suggested too. I've not tried to manully set a MAC address on anything before. I always either used the burned in address or let the processes running decide if they want to use virtual addresses.
I guess that's why you're "PRISCILLA" and I'm "forrest". I guess it's true what my mama always said.... Life is like a box of chocolates. Thanks. fg Quoting Priscilla Oppenheimer : > A cisco router broadcasts a gratuitous ARP response > announcing to the world > its IP address when it boots. See this example: > > Ethernet Header > Destination: FF:FF:FF:FF:FF:FF Ethernet > Broadcast > Source: 00:00:0C:3F:00:D4 > Protocol Type: 0x0806 IP ARP > ARP - Address Resolution Protocol > Hardware: 1 Ethernet (10Mb) > Protocol: 0x0800 IP > Hardware Address Length:6 > Protocol Address Length:4 > Operation: 2 ARP Response > Sender Hardware Address:00:00:0C:3F:00:D4 > Sender Internet Address:172.16.10.1 > Target Hardware Address:FF:FF:FF:FF:FF:FF Ethernet > Broadcast > Target Internet Address:172.16.10.1 > > Is your router not doing that for some reason? You > could do some sniffing to > see whether it does it. The gratuitous ARP should put > the right ARP data > into the 6509's ARP cache. > > So, I'm wondering if the ARP cache is the real > problem. > > When you had the new router installed, what did "show > int ethernet" display? > Was it up/up? > > Can you send us some of your config for some more > clues?? > > _______________________________ > > Priscilla Oppenheimer > www.troubleshootingnetworks.com > www.priscilla.com > > Mark Smith wrote: > > > > Unfortunately I don't have access to the 6509 or it > would be a > > done deal. My stuff's at a Sprint co-lo facility and > getting > > thru to a live tech across the country at Sprint is > next to > > impossible. The 6509 is theirs and is what I connect > to on > > their network to get out to the world. I was just > looking for a > > way to force their equipment to clear or refresh > it's arp cache. > > Thanks. > > > > Quoting Priscilla Oppenheimer : > > > > > Can't you just do a "clear arp" on the 6509? > That's a > > > commonly-used IOS > > > command. I would assume it works on the 6509. Or > > > should I say ass-u-me it > > > works. :-) > > > > > > Priscilla > > > > > > Mark Smith wrote: > > > > > > > > I need to replace a router in a cabinet at the > > > facility where > > > > my hosted servers and equipment is. My equipment > is > > > "talking" > > > > to the hosting facility's network via a port on > a > > > 6509 switch. > > > > I replaced my router and then nothing from my > > > network could > > > > connect to the outside world. I waited about 2 > > > minutes (during > > > > which time my entire site's down and my bosses > get > > > VERY > > > > nervous) and I never was able to connect from > inside > > > and my > > > > tester on the outside was never able to get in > to > > > me. I finally > > > > put router #1 back in and all was well again. > I've > > > scoured the > > > > configuration and #2's is identical with #1 so I > > > don't believe > > > > that is the problem. I'm ass-u-me-ing that the > > > reason for this > > > > is the 6509 port's ARP cache is looking for the > MAC > > > address of > > > > router #1 and it ain't there anymore. Would this > > > ass-u-me-ption > > > > be correct or is it possibly something else I'm > not > > > > thinking/aware of? If it is an ARP issue, is > there a > > > way that I > > > > can remotely force the 6509 port to > > > reset/clear/refresh it's > > > > ARP cache? I'm at a Sprint facility and I'd > sooner > > > get a live > > > > body (that's not a first level phone answerer > > > anyway) to talk > > > > to me when I'm calling Mars than trying to get > one > > > at Sprint. > > > > > > > > Any ideas/thoughts/chastisements on missing the > > > obvious here? > > > > As much as I'd like to work with Cisco gear full > > > time, it's > > > > only a very small part of my current job and, > > > consequently, due > > > > to my lack of familiarity with what you guys do > all > > > day every > > > > day, it's very likely that I'm missing something > > > that all in > > > > the world except me know about. > > > > Thanks for any help or ideas. > > > > > > > > Mark > > > [EMAIL PROTECTED] > [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=56717&t=56680 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
