Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [cisco]

Cisco is a provider of switches and routers to commercial consumers. Cisco devices run IOS or NX-OS operating systems. This is a generic tag to be used when no more specific tags are available. See the partial list of tags in the full Tag Wiki.

Cisco is a provider of switches and routers to many medium and large companies. Cisco devices often run IOS or NX-OS operating systems.

Since Cisco acquisition of Linksys, the consumer line of switches, firewalls and routers (which do NOT run IOS) have been rebranded under the Cisco name.

This tag is a generic tag - Wherever possible a more specific tag related to the product you are using should be used instead. For example:

, , , , ,

2629 questions
1
vote
7 answers

Windows / Cisco MAC problem

Problem is bizarre, at least to me. I have a windows 2003 dedicated server. Every now and then (approx every three months), Cisco switch disconnects this server like so: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by …
vnuk
  • 506
  • 1
  • 8
  • 17
1
vote
2 answers

Cisco router - cannot access NATed outside IP from local network

I'm configuring a small network at work, and I have some problem. We're assigned 4 external IPs. I have them in range 173.228.60.35 to 173.228.60.38. I mapped one of the global IPs to local IP by NAT, by so that I can access the machine from the…
Jeeyoung Kim
  • 229
  • 2
  • 8
1
vote
1 answer

Cisco switches and Comcast SMC3G: DHCP works, IP doesn’t

I’m the chairman of the wiring committee for a hundred-unit condominium, and not a Cisco expert. Yesterday we got Comcast Business service, with an SMC3G router/modem, which works fine in isolation, or when I connect my laptop to it via our old HP…
Flash Sheridan
  • 75
  • 1
  • 11
1
vote
1 answer

RMON2 on cisco switches

I am investigating using RMON for traffic analysis. Can I use a Catalyst 3560 to monitor traffic over it using RMON2? I have RMON options from the IOS but some of the options I thought I should have appear to be missing.
Matt
  • 1,142
  • 1
  • 12
  • 32
1
vote
1 answer

Cisco ASA Firewall for servers

I'm running website with a good traffic per day. I have two scenarios: Data Center 1 50 servers currently they are protected with APF(iptables) I'm looking to put a centralized Cisco ASA 5520 firewall in transparent mode. 600K visitors per day…
Linux Geek
  • 11
  • 2
1
vote
2 answers

2 cisco 3560 switches (layer3)

I would like to create ACL to allow port 22, 80, 443 from outside and drop any other service . can you please explain to me how to do it?
edotan
  • 1,876
  • 13
  • 39
  • 57
1
vote
2 answers

Cisco 3750 Policy Based Routing Limitation?

I have two 3750s that are routing via SVIs for server subnets.(Core1 and Core2 respectively). On Core1 I have vlan 1100 that has an SVI of x.x.100.1 with a transparent squid proxy on 100.3. When I do the following on core1: ip access-list extended…
btk_
  • 333
  • 3
  • 11
1
vote
1 answer

System MTU for SAN switch

I have a SAN with redundant cisco 2960s when I set it up a while ago I set all of the interfaces to use an MTU of 9000. I was looking at the config today and I noticed this line system mtu routing 1500 will that cause any problems? or because this…
Peter
  • 1,102
  • 3
  • 18
  • 32
1
vote
1 answer

Function of SOH, LOH, POH in SONET

Can anyone explain what is the function of section overhead, line overhead and path overhead in SONET STS-1 frame? Why they are used? Thanks, Neel
Neel
  • 111
  • 1
1
vote
1 answer

where can i find a RADIUS configuration example of A cisco 2106 in combination with A juniper steel belted radius?

I'm looking for a configuration example of a Cisco wireless lan controller in combination with a juniper steel belted radius appliance (used to be made by funk now acquired by Juniper). It states in the release notes for the cisco wlan controller…
user9648
1
vote
2 answers

Problems with commands to configure the NAT on CISCO ubr7200 series

I have a Cisco uBR7200 series CMTS with these features: Cisco Internetwork Operating System Software IOS (tm) 7200 Software (uBR7200-K8P-M), Version 12.3 (9a) BC9, RELEASE SOFTWARE (fc1) Cisco uBR7246VXR (NPE400) processor (revision A) with…
user725328
1
vote
3 answers

Cisco 1841: Can someone decipher this feature/package code?

Looking at a used Cisco 1841 router with the following feature/package "code"; I'm assuming there's a T1 interface and 128MB of Flash RAM, but the rest I'm not sure of: W/WIC-1DSU-T1-V2 IP BASE 32FL 128DR Really want to know how many Ethernet…
gravyface
  • 13,957
  • 19
  • 68
  • 100
1
vote
2 answers

Cisco IPSec, nat, and port forwarding don't play well together

I have two Cisco ADSL modems configured conventionally to nat the inside traffic to the ISP. That works. I have two port forwards on one of them for SMTP and IMAP from the outside to the inside this provides external access to the mail server. …
Alan
  • 11
  • 1
  • 3
1
vote
1 answer

ASA5520 7.2 to 8.x upgrade

Our customer wants to upgrade his ASA5520 from 7.2 to 8.x. He has quite a big config and uses lot of features. eg. a/s failover, subinterfaces, ~70 VPN tunnels (ssl and ipsec), bunch of grouped object's, some policy-maps, lot of ACL's, NAT…
sam
  • 155
  • 2
  • 5
  • 17
1
vote
1 answer

SSH handshake timeout with NAT on Cisco 881W

I'm having some issues setting up port forwarding using static NAT on a Cisco 881W ISR. I've confirmed that the ssh daemon is working from the linux box inside the nat. My question is regarding the fact that any inbound ssh connections are able to…
0xDEADCE11
  • 13
  • 4
1 2 3
…
99 100