From: ccie2be (ccie2be@nyc.rr.com)
Date: Wed Aug 04 2004 - 10:37:45 GMT-3
Hey Tom,
Thanks again for staying with me on this.
OK, I'll check later today when I'm back on the rack around noon.
But, until I'm able to get back on the routers and switches, I'm wondering
about a couple things:
Note the following:
a) There are no acl's on any interfaces on any of these routers or switches.
b) There's a 802/1q trunk configured between the 2 Cat's with vlan 36 the
native vlan. All vlans are permitted across the trunk and pruing is enabled.
c) I haven't changed any default settings such as proxy-arp on any of the
routers or switches.
1) Could everything be configured correctly and this problem still exist?
Or, must there be some sort of configuration error?
2) Based on the config's you saw, there weren't any obvious configuration
errors, true?
3) What should I be looking to see in the output of the show ip arp? And,
how should I be using that output to troubleshoot this problem?
4) Assuming there aren't any configuration errors, what do I do then?
Thanks, Tim
----- Original Message -----
From: "Tom Martin" <tig@wiltecinc.com>
To: "ccie2be" <ccie2be@nyc.rr.com>; "Group Study" <ccielab@groupstudy.com>
Sent: Wednesday, August 04, 2004 9:04 AM
Subject: RE: IRB question from IE lab 3 task 1.9
Tim,
My "sh ip arp" was from R3 where yours was from R6, that's why your output
references BVI1 instead of the interface. Issue the command from your other
routers to see of the ARP process is completing successfully between edge
routers.
IP ARP traffic will pass through IP access-list security, which may help
identify any security misconfigurations. It's also possible that one router
can correctly resolve the other but not vice versa, which could be due to an
802.1Q native VLAN mismatch (among other things). The results of the 'sh ip
arp' might give you a better idea of where to focus your troubleshooting
though.
-- Tom
-----Original Message-----
From: ccie2be [mailto:ccie2be@nyc.rr.com]
Sent: Tuesday, August 03, 2004 10:34 PM
To: Group Study; Tom Martin
Cc: Brian McGahan
Subject: Re: IRB question from IE lab 3 task 1.9
Hey Tom,
I'm starting to get the feeling that the problem is some stupid little thing
I'll be very embarrassed by once this is figured out. But, so far, I can't
figure out what's causing this problem. Here's some output from R6:
[snip]
Rack1R6#sh ip arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 136.7.136.6 - 0050.d15f.7420 ARPA BVI1
Internet 136.7.136.3 0 0002.fd3d.e081 ARPA BVI1
Internet 136.7.136.1 0 0002.b988.bde0 ARPA BVI1
Internet 204.12.7.6 - 0050.d15f.7420 ARPA
FastEthernet1/0/0.6
[snip]
Some things I noticed while comparing outputs. In your show ip arp, the
interface referenced was fa0/0 while my output referenced BVI 1. Do you
know why that is? Does it matter in this scenario?
This archive was generated by hypermail 2.1.4 : Fri Sep 03 2004 - 07:02:32 GMT-3