Browsing articles tagged with "ios - 4/8 - Admins Goodies"
Aug 21, 2011
tom

How do I find out what the WIC Model is from CISCO IOS?

How do I find out what the model number of a WIC is with an IOS command? In show interface all I get is ‘Hardware is Fast Ethernet’, I don’t see anything under ‘show hardware’ either… Another command that may work is show diag. It will tell you the type of WIC, but I don’t think it started showing the actual WIC part numbers until IOS 12.2. Check more discussion of this question. Bookmark on […]

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Aug 21, 2011
tom

Help me with my Cisco ios config

I’m setting up a cisco 881 (this is my first ios device) I got everything working the way i want except port forwarding im trying forward all incoming port 80 traffic to 10.10.10.60 and I don’t see that option anywhere in the cisco configuration professional. so i assume ill have to add it command line style Please also feel free to point out any other issues you feel might cause issues for me. (password have […]

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Aug 21, 2011
tom

Setting spanning tree link “priorities” in Cisco switches

I’ve got a pair of C2960G-48 switches (running IOS 12.2(46)SE, if it makes a difference) with redundant trunks in place. On these switches there are a bunch of VLANs that carry quite heavy traffic at times (enough to completely saturate the trunks each). I’d like to put in a per-VLAN cross-connected cable to help carry the load and avoid saturating the common trunk. The one thing I’m not sure of is how to prioritise this […]

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Aug 21, 2011
tom

Cisco router and switch configuration

I want to configure a Cisco 2600 series router to be DHCP server. To the ethernet port i want to connect a Cisco Catalyst 2900XL 24 ports switch, in this switch i want to connect a computer in port X2, the 2600 series router should be in port X1 and a internet uplink in port X24. On this uplink another DHCP server is running. Is it possible to configure these devices so that the computer […]

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Aug 19, 2011
tom

cisco router loses configuration on reload even after saving it

I’m configuring a Cisco 3640 and it’s not saving simple things like my hostname. I’ve tried with ‘wr’ and ‘copy running-config startup-config’. Also erased the configuration but no luck. There’s no error whatsoever when running the above commands. Is my flash bad? Anyway I can debug this more thoroughly? Thanks! It sounds like you have a configuration register at the wrong setting. For instance, setting: confreg 0x2142 at an rommon will boot the router to […]

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Aug 19, 2011
tom

Basic IPv6 firewall on Cisco IOS for small network

Now that I have IPv6 connectivity to my network, I’m looking for a basic IPv6 firewall configuration for IOS. It used to be that we could rely on NAT to ‘hide’ internal (read: outgoing connections only) machines but thankfully we no longer have NAT to do the work for us. What is a sensible set of IOS configurations / ACLs for a small internal network? Here’s what I’ve come up with. It works, though I’m […]

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Aug 19, 2011
tom

Cisco Aironet (802.11n models): how to put a WEP128 ssid and a WPA/WPA2 ssid on the same radio?

I’m using a Cisco AIR-1252AG (IOS 12.4(10b)JDA3) and I must provide both a WEP128 wlan (for compatibility with older embedded devices, this will go to a firewalled vlan) and a WPA2 (WPA1 would be ok too) wlan on the same 2.4GHz radio. Both with pre shared keys. While I can set WPA options in the SSID, the WEP encryption seems to apply to the whole radio interface. I’ve built the WEP config using the ‘express […]

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Aug 18, 2011
tom

Un-failing over a Cisco PIX 515e

We had a power outage at our data center last week and when our dual PIX 515E running IOS 7.0(8) (configured with a failover cable) came back, they were in a failed over state where the Secondary unit is active and the Primary unit is standby I have tried ‘failover reset’, ‘failover active’, and ‘failover reload-standby’ as well as executing reloads on both units in a variety of orders, and they don’t come back Primary/Active […]

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Aug 18, 2011
tom

Can IOS be upgraded on a Cisco Catalyst 6509 switch without downtime?

There’s this Cisco Catalyst 6509 switch with 2 (two) supervisor modules; one of them is active, the other is (almost always) in standby. We need to upgrade IOS; current version is 12.2.something (I can check exactly which one, if this does matter). Can this be done without service interruption? Something like “upgrade the standby supervisor, activate it, upgrade the other one”? You want to do a Enhanced Fast Software Upgrade (eFSU). It is supported in […]

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Aug 18, 2011
tom

RADIUS authentication on Cisco switches: how to assign privilege levels?

I need to configure some Cisco switches (IOS 12.x) to authenticate against a RADIUS server; the server is Windows Server 2003’s IAS, and it validates users against his Active Directory domain. I know how to configure the switches to validate usernames/passwords against the RADIUS server, and I can succesfully login using an AD account; the question is: how can I set privilege level 15 for users, in order to not have to use enable each […]

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