1
vote
1answer
169 views

Cisco ASA: Terrible network speed once or twice a day, fine otherwise

I've been trying to get to the bottom of this for a while now and, well, it seems like I can't. We have two servers behind an ASA5505 (software version 8.3) at a datacenter. They run a wide variety of ...
1
vote
3answers
5k views

How do I identify unknown protocols on my Cisco 2811?

I have a misbehaving Cisco 2811. It serves our office of 20 with internet and phones via Call Manager Express. Except that lately the phones aren't working right and internet is choppy. The outside ...
2
votes
2answers
141 views

How do I find where packets are coming from that are being blocked by an ACL?

I have an ACL to prevent regular workstations from accessing the management vlan on our switch. Every 5 minutes we get the following log entry: %SEC-6-IPACCESSLOGS: list mgtvlan-acl denied 0.0.0.0 ...
0
votes
1answer
261 views

Cisco 878 Router Physical Layer troubleshooting

My problem: Upon connecting the FastEthernet0 with a straight-through cable to a Catalyst switch, the line protocol comes up briefly and then goes down. Interface goes down too, I now have this on my ...
2
votes
2answers
1k views

Losing 1/3 of my download speed with my new router, any ideas on how to fix?

This is a cross post from superuser.com since no one over there seems to know anything. I recently replaced a dying D-Link router (DI-524) with a Cisco/Linksys RSV4000. I'm really happy with the ...
2
votes
2answers
238 views

What are the most important skill/knowldege sets for a network administrator to have to support VOIP?

As a network administrator (Cisco switches, work with WAN providers, protocol analysis) I have an "area of responsibility" for the customer's VOIP project. The telecom group has primary ...
0
votes
6answers
725 views

Debugging Cisco 2621 Routers

I've recently noticed problems with my 2621 router - it becomes unresponsive for about 10 minutes at a time, about 10 times a month. The router sits inbetween the outside world and servers which I ...
0
votes
1answer
3k views

How to temporarily disable a Cisco IPS module for troubleshooting

I have a Cisco IPS module running in my ASA 5510 firewall. Right now I'm trying to troubleshoot a network/VPN problem that two of my users are having when they VPN into a remote partners site. I ...