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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:

, , , , ,

2614 questions
11
votes
8 answers

Blocking Facebook and Myspace by IP address

I'm having some trouble making a Cisco ASA device block certain social networking sites which have become time sinks in our office. This question is really in two parts: Is there a reliable way to retrieve all of the IP addresses for these…
Jack M.
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10
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3 answers

Connect to switch's console port through ethernet patch panel

In our office building, we have a Cisco SRW2048 switch. On the back, it has a serial port for console connections. I would like to connect this console port to my computer in my room. The switch is located in the network room next to the ethernet…
gen_Eric
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10
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3 answers

Native VLAN mismatch and missing VLAN?

I'm trying to wrap my head around what exactly is going on here with a new site's configuration of their networking stack. This particular piece I am working is pretty simple but I having a hard time figuring out what the original intention was.…
user62491
10
votes
2 answers

How to safely install a new IOS image on a Cisco device when the installed flash memory size isn't enough for two of them?

Today I was updating IOS on a Cisco 877 router, and a problem came up: the installed flash memory wasn't enough to hold both the old and the new IOS images, so the new one couldn't be uploaded unless the old one was deleted first. This of course…
Massimo
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10
votes
5 answers

Spanning Tree Setup

I understand the basics of spanning tree, but that's about it. I'm hoping that someone can tell me if this will work as I want it to. I've got two Cisco ACE load balancers setup for redundancy. Each ACE is connected to its own layer 2 switch. …
mrdenny
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10
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3 answers

Why is my router CPU at 40% when no processes use more than 2%?

I have a problem, I have a Cisco 1841 running Cisco IOS 15, and I get strange behavior. The CPU usage is shown as 40%, but there is no processes that is using this much CPU power. Here is an example: lev1841#show processes cpu sorted CPU…
Kedare
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10
votes
3 answers

How do I reach my internal server on the external IP?

We are trying to configure our Cisco 5505, and it has been done through ASDM. There is one big problem that we're not able to solve, and that's when you go from inside to outside and back in again. Example, we have a server "inside" and we want to…
Fore
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10
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2 answers

Smart card authentication to a Cisco switch?

We have our Cisco network devices configured to authenticate network administrators using their domain accounts via RADIUS running on a Windows 2008R2 server with the network protection role. This works great for logging into the switch via SSH…
murisonc
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10
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7 answers

Are VLANs necessary for my environment?

I'm the new network manager for a school. I've inherited an environment made up of several Windows servers, about 100 Windows clients, 10 printers, 1 Cisco router, 6 Cisco switches, and 1 HP switch. Also, we're using VoIP. There are four floors in…
kleefaj
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9
votes
1 answer

How to export Cisco AnyConnect preferences and certificates to another PC

I have two computers (PC and MAC) connected to different organization VPNs. I want to be able to connect from MAC to the same VPNs set on PC. So I need to export VPN list and certificates, etc to my MAC. Is there a way to do it or what do I need to…
John Glabb
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9
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1 answer

What happens in the real world Internet - BGP and OSPF?

I have never worked on the customer premises, but my assumption is that one service provider runs IGP services internally - For example - OSPF or IS-IS. Now, when one service provider has to reach another service provider to communicate server on…
dexterous
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9
votes
1 answer

Cisco BGP Unequal Cost Load Balancing

I'm trying to implement BGP Unequal Cost Load Balancing feature in my network. According to cisco manuals (long: http://www.cisco.com/c/en/us/td/docs/ios/12_2s/feature/guide/fsbgplb.html, short:…
Shamanu4
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9
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2 answers

Cisco DNS doctoring or Hairpinning?

I've the following configuration: CISCO 881, IOS 15.2(4)M6. On WAN interface is configured the 86.34.156.48/29 subnet from our ISP. Behind the router is staying 2 webserver. NAT: 86.34.156.51 <> 10.10.10.100 (private IP, server1). If I configure…
Szilveszter Zsigmond
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9
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1 answer

Ubiquiti Wireless Guest Network VLAN w/ pfSense + Cisco Switch

I'm trying to setup a guest wireless network in an environment that has been humming along nicely for quite some time. The wireless runs on Ubiquiti UniFi APs. I hope this is clear. If its not, feel free to ask questions.... I have a feeling this…
David W
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9
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2 answers

HP to Cisco spanning tree root flapping

Per a recent question I recently configured both my HP (2x 2900) and Cisco (1x 3750) hardware to use MSTP for interoperability. I thought this was functional until I applied the change to the third device (HP switch 1 below) at which time the…
Tim Brigham
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