North American Network Operators Group|
Date Prev | Date Next |
Date Index |
Thread Index |
Author Index |
Re: Router / Protocol Problem
- From: Matthew Crocker
- Date: Wed Sep 06 10:13:02 2006
Does your peer or you have any ACLs on the PtP link which may be
dropping the packets? If your peer is doing uRPF and doesn't have
your route properly installed it can cause problems on their edge.
Are the sites you cannot reach akamaized? I've had issues with some
akamaized sites when I was being redirected to akamai servers that
weren't on my network. Do a dig on the website and see if it returns
an akamai server
Is there any packet loss/CRC errors on the link to your peer? A
noisy line will affect large packets more than small packets, I've
had issues where only the text/CSS of a website would come up but the
images would not.
Any MTU issues? Same as above, MTU issues causing large packets to
get dropped and no images on websites.
Pings, traceroute,telnet all work in those cases
On Sep 6, 2006, at 9:04 AM, Mike Walter wrote:
I normally would not post to the group, but I am 100% stumped and
have talked with peers with no luck.
I have (2) Cisco 7204 Routers running BGP with 3 peers and HSRP. I
am not doing anything special with BGP, pretty much a default
config that has not changed in years.
Recently with no changes to my network, I have been having problems
connecting to certain websites and mail servers. I am always able
to ping the sites and trace route without error. If I telnet to
port 80 or port 25 it does not connect. If I login to my router
and telnet sourcing my each of Internet Providers ports, I am able
to get to the sites. I have talked with all the providers and none
can find a problem. If I shut down one specific peer, everything
works fine. So I keep thinking it was that peers problem some
how. I have tested with just that peer up and I still can not
connect. However, when talking with that peer, they are able to
telnet from their network to the sites I can not reach. I don't
know what else to check besides shutting down that peer. Which
since it is under a 3 year contract, not an option. That isn't the
real solution anyhow.
Can anyone shed some light on or off-list?
Matthew S. Crocker
Crocker Communications, Inc.
PO BOX 710
Greenfield, MA 01302-0710