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Questions tagged [ios]

The operating system used on the majority of Cisco's routers and switches; a package of routing, switching, internetworking and telecommunications functions tightly integrated with a multitasking operating system. For Apple's mobile device OS, use apple-ios.

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GNS3 - Emulating a not supported Cisco router (model 881w)

I want to create a new configuration for a Cisco 881w from scratch. So I want to replicate my environment on GNS3. But I cannot emulate a Cisco 881w (which is the router i have) into it. So I am wondering which other router supported by GNS3 should…
Jonathan Rioux
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Cisco AP Recovery mode - TFTP issue

I am booting without IOS and I get this prompt: ap: then I issue these commands: ap: set IP_ADDR 192.168.0.111 ap: set NETMASK 255.255.0.0 ap: set DEFAULT_ROUTER 192.168.0.1 ap: tftp_init ap: ether_init Then I want to copy an IOS image to…
Jonathan Rioux
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Cisco 881w AP factory reset

If I want to return to the factory IOS and configurations of the AP only, I must issue this command: service-module wlan-ap0 reset default-config right? But which IOS is going to replace the current?
Jonathan Rioux
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Cisco AP commands dissapeared after IOS downgrade

enter code hereAfter downgrading a Cisco 881w AP (WLAN-AP), something went weird. When I connect on the WLAN-AP interface using: service-module wlan-ap0 session I got this prompt: AP588d.09ba.156e> Then when I input "enable", it asks me for a…
Jonathan Rioux
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Cisco IOS subnet mask using bit notation

I was wondering if it was possible to use bit notatiton when configuring interfaces, or just in general, within the CISCO IOS. I have friends and others swear that they've been able to before, but not able to remember how. I get errors when…
tr0yspradling
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IP SLA on Cisco 1921 IOS 15.2T

Can someone explain to me why I cannot create IP SLA probes on a Cisco 1921 with the latest IOS (15.2T). It is clearly available for that IOS on that router model on the Cisco Feature Navigator ... Router(config)#do sh ver …
pour toi
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Cisco 12.4 ACL with DHCP-obtained address

I figured this would be an easy one, but I've had a good amount of trouble finding this answer myself. I have a Cisco router that I'm setting up to have my Internet connection on one interface (external) that obtains an IP via DHCP, and my LAN on…
Paul Kroon
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Cisco 871 IOS BVI: Distinguishing incoming and outgoing

I understand that a BVI is very much equivalent to a network switch. But it includes the benefit of being able to have an access control list. I am doing this, but I would like to more effectively distinguish incoming vs outgoing. Right now, all I…
700 Software
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How does Cisco IOS ACL established flag work

You can permit outgoing packets, but then you need to permit the responses. One way is to permit any packet that is a followup to an established connection. access-list ??? permit tcp any any established But how does this work? Is checking…
700 Software
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How to delete multiple files from a Cisco router flash memory

I have filled up my router's flash with voice files and folders and wanted to remove them. I there a script that can delete all files in flash except for the IOS image?
kay
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Cisco NAT - Sharing single public IP with multiple services

We have this setup on a SonicWall firewall, but I can't for the life of me figure out how to do it on a new Cisco 5520. Here is what I want to do External_IP1:25 --> InternalMailGW_IP:25 External_IP1:80 --> InternalWeb_IP:80 The ACLs are…
ScottAdair
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Forwarding a port internally - Cisco-881

I have a Cisco 881 on which I forward traffic coming from outside to an internal IP, but if an internal IP accesses the external IP, it gets the Cisco HTTP Server (or a broken connection if i set no ip http server. Is there a way to forward both…
Dan McClain
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In which cisco router or IOS verson i can use section command like "show run | section eigrp"

I have seen videos in CBT nuggets for ccnp and ccna. The instructor always uses show run | section eigrp and it looks very good command But i am trying that in GNS , it says command not found How can i use that
Mirage
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Cisco XR Interfaces

I'm trying to figure out if a device which is running Cisco IOS XR is affected. The advisory is published here Assuming I have the vulnerable OS versions, Now I want to check if I have a Cisco Line Card or Cisco CRS MSC with IPv4 address configured…
soulSurfer2010
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IOS: tie SNMP v3 credentials to TACACS or RADIUS?

On Cisco IOS, I'm looking at moving from SNMP v1/2 to v3, which means separate user/password credentials instead of just community strings. Is it possible to have those user credentials pulled from, and authenticated against, a TACACS or RADIUS…
Geoff
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