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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1answer
165 views

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 ...
2
votes
2answers
4k views

Why do I start at privilege level 1 when logging into a Cisco ASA 5510?

I have created a test user that is set to privilege 15 in the config: username test password **************** encrypted privilege 15 When I log in to the ASA 5510 I am in privilege 1 according to ...
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2answers
2k views

What characters are illegal in Cisco IOS username secret passwords?

I am using username secret to add users with encrypted passwords to our switches and firewall. I have been battling with the same switches and firewall for a couple of hours trying to get securely ...
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1answer
1k views

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 ...
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2answers
64 views

Can we route video on my redundant link while the primary is up and turn it off if the primary fails over to secondary?

We have a remote location that is currently routing data over a satellite connection. I am adding a cellular fail over if the satellite goes down. I have been asked to install video cameras that ...
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1answer
2k views

Cisco IOS port forwarding

I'm trying to forward a port to an inside server. I have tried using static nat to forward it and I have opened it up in the access list as far as I know but I can't seem to get it to open.
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1answer
685 views

How do I setup dynamic VLAN assignment on an autonomous Cisco 1142n?

I've gotten my Cisco 1142n autonomous AP configured with every option under the sun, but I still can't get dynamic VLAN assignment working! I verified the following: I give priority to VLAN ...
0
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1answer
619 views

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 ...
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5answers
322 views

Cisco 2811 to Forefront - stop broadcast traffic

I recently upgraded from an old ISA to a Forefront box. I'm now receiving a ton of 0xc0040050 errors. The vast majority are to an internal broadcast address - 100.100.100.255. This is a legacy subnet ...
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1answer
389 views

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 ...
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0answers
408 views

Route based IPSec VPN Between IOS and ASA

I'd like to do a route based VPN between two sites. The purpose of this is to get remote site traffic passing through a transparent gateway at the headend, instead of using a proxy. So currently it ...
4
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3answers
3k views

How to advertise routes to IPSec tunnels in OSPF using Cisco IOS

I have Cisco 1800 series router (running C181X-ADVIPSERVICESK9-M) with lots of IPSec tunnels. I want to add this router to OSPF and configure it to advertise routes to remote subnets accessible via ...
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2answers
120 views

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 ...
1
vote
1answer
187 views

Trunk port wont accept the Printer vlan

I have three switches daisy-chained together and I have a printer vlan serviced with a print server off the core (1st) switch. the middle switch trunk port will not accept the printer vlan. I issue ...
3
votes
2answers
310 views

Delay NTP Initialisation, Cisco 877W, IOS 12.4(24)T1

I have a Cisco 877W which I'm using for my home ADSL connection (and as a refresher in Cisco IOS). I've got a working config in-place with my PPPoA connection coming online correctly, and VLANs and ...
3
votes
1answer
2k views

Output Drops on Cisco Switch — Counter?

I was always under the impression that the Total output drops was a counter that goes up until it resets (or maybe wraps around 4 billion). However, this seems to indicate otherwise, or something is ...
4
votes
1answer
322 views

Can somebody please explain IOS line authentication?

I'm trying to understand a config on one of our Cisco routers (teaching myself iOS) and have run into a problem with one line. Can somebody please explain the "line enable" piece of the command below ...
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3answers
5k views

How to obtain Cisco IOS firmware?

Quick and simple question, but I've not been able to find an answer around. I have a Cisco ADSL router (model 877). I don't have any Cisco support contract. How can I obtain an updated firmware for ...
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3answers
90 views

Cisco ACL Not Applying

This is probably something extreamly simple but I am executing the following code to block usage of port 80 on ip 192.168.1.50 and it does not seem to be working. The interface is right and I am using ...
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2answers
78 views

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 ...
2
votes
1answer
6k views

How to disable ICMP redirect packets in Cisco IOS?

I'm studying a "good practices" document for Cisco IOS, and one of its controls tells me to disable ICMP Redirect packets in the router. Sounds reasonable. So I go test it in Cisco Packet Tracker (a ...
4
votes
1answer
81 views

Cisco IOS XR version clarification

I've run across this cisco advisory It says: This bug was introduced in Cisco IOS XR Software release 3.6.2 and is fixed with SMU hfr-k9sec-3.6.2.CSCtd74795. The SMU ID for this fix in ...
4
votes
1answer
214 views

cisco 870 assign IP

I'll try to be "short." I've successfully enabled http server option on my Cisco 870, now I need to reach it and use the web based configuration. I haven't found how to assign an IP to the router ...
2
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4answers
1k views

Cisco 1800 series router simulation program

I need to know how to program these routers for school, but I need to exercise at home. Are there simulators for the console interface, for learning purposes? I took a look at eBay to get one, but ...
0
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1answer
82 views

Will cisco 3750-e switches run the old ipservices ios code?

was wondering about cisco 3750-e switches. Will they run the old ipservices ios code? Or do they only run the univeral image? Thanks
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2answers
2k views

Cisco Terminology: flash and nvram

I'm a student that will be taking my CCNA exam in early June and I'm doing a lot of practical revision, I tend to get sidetracked by little things such as this question I'm about to post. It's ...
9
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1answer
362 views

Simple Multicast Design

In order to support desktop imaging requirements I need to correct the multicast design on an existing network, but am not well versed in this subject. The diagram below gives a basic example of the ...
0
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1answer
64 views

ios: how to stop output of a show command

Can anyone tell me how to break output of a show command in cisco ios? Say I don't want to see all of 'show run' and I got the info I need, what keys can I press to stop it from printing the rest of ...
0
votes
2answers
762 views

Configure hairpinning on Cisco 871 IOS 12.4(15)T4?

I'm a newbie to IOS. In the past I've used consumer routers which seem to have the smarts to automatically route requests to internal hosts addressed by their public name back to the internal network. ...
0
votes
1answer
542 views

Cannot login to Cisco 2911 over ssh?

30 minutes ago my router is not accepting ssh connection. Well, ports is open (due to nmap), ssh simply hangs on reading from Cisco socket (observation from strace): /home/rafal/.ssh/id_dsa-cert type ...
1
vote
2answers
1k views

Is there a Cisco IOS command that will show DIMM info per slot?

I have a Cisco 2811 with 256MB DRAM. I know this because show version tells me so. I want to upgrade it to 768MB. I know that this takes 1 - 512MB amd 1 - 256MB DIMM. I know that the 2811 has 2 ...
0
votes
1answer
1k views

Can't enable IPv6 in Cisco 2800 router running IOS 12.4T

I can't enable IPV6 in a Cisco 2800 router that runs iOS version 12.4T. I followed the summary steps section in Cisco's web page . But whenever I type "ipv6" on the command line (as in 'ipv6 ...
2
votes
2answers
1k views

Cisco 2610XM: Advanced Enterprise vs Advanced IP Services?

What are the differences from the Adv. Enterprise firmware and the Adv. IP Services? From the 2610XM perspective. Regards,
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votes
1answer
154 views

More than 8 classes in a policy-map - Cisco 3560

It appears I am limited to 8 classes per policy-map. Here is the error message when using the Cisco Network Assistant: The policy "policy-name" contains more than 8 policers, which means it ...
0
votes
3answers
406 views

List Of Cisco IOS Devices

I want to start playing a bit with Cisco IOS and I have a Cisco WAP200 Wireless Router here, so I want to know if it comes with IOS and also where I can find a list of the IOS devices so I can know ...
2
votes
2answers
193 views

DMZ-to-outside Access Lists

I'm learning about firewalls and access-lists, and I'm trying to decide what sort of access list I should have on the DMZ, particularly regarding outbound traffic. There's certain outbound traffic ...
1
vote
1answer
828 views

Cisco IOS: Is ip inspect used?

There is a Cisco IOS router with the following code in it. The below code seems to define Context-based Access Control Engine inspection rules. I don't think any of this is used. The only occurences ...
3
votes
5answers
3k views

Is there a way to submit a batch of commands to a Cisco router and have them execute from the router?

I need to change the configuration of a remote (6 hours' drive) client's Cisco 871 (IOS 12.4.15T) from my location because of some new internet service at his location. To be more precise, I need to ...
6
votes
1answer
5k views

Why would Windows Server not respond to DHCP DISCOVER?

My network was working just fine and I broke it. There is a Cisco 1711 router which was configured to hand out DHCP leases to the client PCs. I have a domain controller (Server 2008) on the same ...
2
votes
2answers
3k views

Restoring a Cisco router config using a config file

I'm working with a Cisco router over telnet (actually PuTTY), and I'm a newbie to ios. I'm slowly getting the hang of it, but have a very basic question: I have issued a show running-config command ...
1
vote
1answer
121 views

IOS traffic-export equivalent for Junos

In IOS the traffic-export command allows you to take incoming packets and send them, unaltered, to a specific interface. Is there an equivalent way to do this in Junos? I've got a J-series 2350 here. ...
0
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1answer
100 views

Cisco T1 Routing Help

Thanks to someone on this site I was able to get the Serial0/0 interface up. I now have: DCD=up DSR=up DTR=up RTS=up CTS=up My next challenge seems to be in the routing and/or PC ip setup. ...
1
vote
1answer
240 views

Cisco 1760 T1 Setup

My 1760 has a WIC1-T1 card in Slot 0 and the slot 0 "OK" light is lit. When the router boots it shows that it sees the T1 card. I would like to configure my T1. I received the following details from ...
0
votes
1answer
521 views

Cisco 2911 - problem with DHCP

i am configuring DHCP daemon on Cisco 2911. At some point i assigned address 192.168.50.50 to one box (using MAC address 'relation'). When I wanted to saved config - I got warning, that address ...
0
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4answers
2k views

How to start Cisco 2911 with presaved configuration?

I briefly configured branch router Cisco 2911 and saved config. Unfortunately - after rerun Cisco needs "copy startup-config running-config" to read configuration (I really need this - for example to ...
1
vote
1answer
94 views

IOS not saving evaluate rule in access-list

I have a basic firewall set up on an pretty od IOS in form of IPv6 access list exterior-in6 evaluate exterior-reflect sequence 1 permit ipv6 any host [my external address] sequence 10 permit ...
0
votes
1answer
400 views

Cisco 851 (IOS) router: FastEthernet 4 (WAN) got the shutdown flag

At a customer location there was a Cisco 851 router (which uses IOS). The PCs on location were all of a sudden unable to connect. We came on site and found that FastEthernet 4 (the WAN port) was ...
0
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2answers
1k views

Cisco IOS BVI ACL: Only allow established UDP

Related: Cisco IOS ACL: Don't permit incoming connections just because they are from port 80 I know we can use the established keyword for TCP.. but what can we do for UDP (short of replacing a ...
0
votes
1answer
490 views

BVI vs Bridge routers

What is the difference between BVI and Bridge on Cisco IOS routers?
1
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2answers
283 views

Cisco IOS ACL types

The built in command help list displays access list types based on which range. router1(config)#access-list ? <1-99> IP standard access list <100-199> IP ...