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

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125 views

How many IP addresses can I expect to block on a Cisco 5500-X Series firewall?

Considering a Cisco ASA (5500-X) firewall for our internet edge in front of our web cluster. At the moment, we use a Linux box with iptables. A log analysis system detects brute-force attacks on ...
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1answer
127 views

Cisco ASA Static NAT Rule Explanation

Here is a chunk of my configuration on my ASA: name <my_external_ip> www.testwebsite.com object-group service http_https tcp port-object eq www port-object eq https access-list ...
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1answer
128 views

Keep router interfaces isolated

Have a Cisco Router 2811 with a HWIC that gives it an extra port so I have 3 Ethernet ports. Have it configured like this: FA0/0- 192.168.1.1 FA0/1- 192.168.10.1 FA1/0- 10.0.0.1 (outside) All that ...
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1answer
83 views

Cisco Networking fiber to fiber

I have a cisco 892 router and a cisco catalyst 2960 switch; both have the SFP fiber module. The plan is to extend the network to the switch using the fiber ports. (Two buildings are connected by ...
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0answers
128 views

Cisco UCS C22 M3 Rack-mount BIOS Recovery

So my Cisco UCS Server's BIOS is corrupt and needs reflashed. When it boots it simply gives me the recovery instructions such as put the recovery.cap file in the root directory of a USB drive then ...
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1answer
1k views

Shouldn't we exclude a static IP from the DHCP pool?

In my office, I have a printer with static IP 192.168.0.254/24. Normally, it should be excluded from the DHCP pool in the router. So I just set the DHCP pool to be in the range of 192.168.0.2/24 - ...
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1answer
77 views

Cisco switch restart doesn't reload config

Something really strange happened to me today. I was configuring a 3750 switch and halfway through the changes I messed up. So I did what I've always done, unplug the power cable from the switch and ...
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1answer
3k views

Configuring Cisco AIR-CAP-2602i as the only WLAN AP on the network

I apologise in advance I'm about half way through CCNA so I may be using incorrect terminology. I've been tasked with putting in a new network at work, topology as follows: Router Cisco 887VA-M-K9 | ...
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1answer
271 views

how publish multi web site with Same port 80 in multi inside web server with cisco router?

I have a problem in publish Multi web Site in multi web server with a single Public IP and all of these Web Sites use Same default port of 80 but have different URL address . I want publish all of ...
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0answers
106 views

ASDM - ASA Issue

This is actually a two part question, if anyone has had experience with the issue and could help me out it would be greatly appreciated. Backstory: Using GNS3 with ASA 8.4(2) and ASDM 7.1(5). I've ...
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2answers
78 views

Cisco Switch went mad

tI have a Cisco SLM2048 Smart Switch which I can't access anymore. The switch is working just fine but: I can't reach it by web interface Doesn't seem to be able to reset it, even if I hold reset ...
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3answers
99 views

Vmotion issues between hosts

Just added two new hosts to our infra, there is an issue with vmotion, the test vm moves over to the hosts no problem but I cannot ping or connect to the vm from outside vsphere once I move it too the ...
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1answer
75 views

Is there any advantage or reason with vertical chassis switch?

When I was looking for Cisco 6500 series chassis, I saw that there are horizontal(6509E) and vertical chassis(6509VE). Although 6509VE has same(or almost same) chassis height as 6513E, but 6509VE ...
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1answer
58 views

what is a switch default gateway [closed]

I have two questions, please help layer 2 switch doesn't know how to routing, but if I set the default gateway in the switch, how can it "routing" or how can it forward the packet to the default ...
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1answer
357 views

Layer 2 and 3 Network and Topology discovery of blackbox network [closed]

I have been given a company network to perform layer 2 and layer 3 network discovery. I have to find out the network topology and infomation about network equipments including switch, router, server, ...
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0answers
131 views

Cisco 1602: rewriting startup-config from terminal

How do I rewrite startup-config on a Cisco 1602 router without affecting the running-config? Outgoing connections from the router (scp, http) are not allowed. I'm not connected to the serial port, ...
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1answer
6k views

Cisco ASA 5505 - NAT or Port Forward for SIP / VoIP ver 8.4

I just had an NEC PBX installed that lets me use SIP trunks for VoIP services, My gateway is a Cisco ASA 5505 running 8.4 and I only have one public/static IP Addresses. So far, my trunks are ...
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0answers
28 views

On a Cisco MDS, when decomissioning a switch, how do I change the “seed” switch?

How do I change the seed switch of an ISL? I'm decommissioning an old switch in our network.
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1answer
965 views

Cisco IPSEC VPN Slow Speeds

We have a site to site IPSEC VPN, both endpoints are Cisco PIX 515e's. The links at both end are 100mb, however speeds over the VPN (logged using jperf) are at most 4mb. Obviously this represents a ...
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2answers
100 views

Cisco IPSec Hardware Requirements

In order to use IPSec on 2811 and 2651XM Cisco routers, does one need any particular hardware module(s) or just the appropriate software?
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1answer
72 views

How can we better pinpoint instability issues on our network?

We have a medium-sized network of 600 users, all on Cisco switches. Where the users are allowed to plug in routers, etc. on the endpoints, so that they can use wireless and/or multiple devices in ...
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1answer
814 views

VTP does not update on client switch

I recently replaced the switch that was functioning as the VLAN server for the rest of the network. Since the replacement however, I have not been able to push any new VLANs to the Client switches. ...
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2answers
146 views

How Can You Tell If IPSec Is Installed on Cisco

How can I tell if my Cisco router has IPSec installed? I went into configuration mode to see about setting up a crypto policy, but the 'crypto' keyword isn't available. Is this an indication that it ...
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1answer
2k views

password required, but none set

I'm configuring a stack of new Cayalyst 2960-X Series switches, and I'm struggling with the following warning: password required, but none set I configured the switch to authenticate against our ...
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1answer
217 views

Cisco IOS, restrict IP addresses per ethernet port #

I am configuring a Cisco 881, and am interested in restricting individual ports on the LAN (FastEthernet 0-3). I would like to be able to limit the IP addresses that someone can use based on which ...
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1answer
718 views

Collision errors reported by Cisco router interface

I have a Cisco 3825 with redundant upstream connections to the datacenter border router. I noticed that there are a large number of "collisions" on the two interfaces. I've read elsewhere that that ...
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0answers
34 views

Find a VPN Name on a Cisco ASA box given a remote IP address

I have a Cisco ASA box with multiple site-to-site VPNs defined. Is there a way to automate finding the VPN name based on a given remote IP address?
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2answers
515 views

Sharing Cisco VPN connection with network peers

We have a Windows Seven host with Cisco VPN Client access configured. We want to share this connection with some linux machines. We tried sharing the Lan connection (GUI option), then adding the ...
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1answer
70 views

Will a Cisco WS-X4548-GB-RJ45 switch module fit in a 3825 router chassis

I currently have a NME-XD-48ES-2S-P 10/100 switch module in my 3825 router and am looking to upgrade it to a 10/100/1000 switch. I found a pretty good deal on the WS-X4548-GB-RJ45 switch module, but ...
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2answers
1k views

How to limit telnet access to only local network users in Cisco [closed]

I need to make so that my telnet service is only reachable by local users, not by anyone from outside in Cisco Packet tracer. Any suggestions please? http://i.imgur.com/RfoNjDz.png
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1answer
117 views

IPsec VPN Server behind Cisco ASA (Transparent mode)

I've a Cisco ASA 5510 with transparent mode, and I'm going to setup a IPsec VPN(Openswan) in a internal linux server(with Public IP). This server has 2 NIC, 1 public IP, and 1 internal IP. I've ...
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1answer
40 views

CISCO router GUI management

Is there any simple solution to connect to routers database with GUI? I mean is it even possible to find an application which could do the configuration without the need to push commands? Thank you ...
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0answers
86 views

How to fix an aborted firmware upgrade on Cisco SLM2048

There is a Cisco SLM2048 switch and the last firmware upgrade aborted, now the switch doesn't work anymore. I can't access the switch. The only evidence is a blinking system LED. As the switch doesn't ...
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1answer
31 views

Cisco Router: Disable RIPng Process?

I have started too many RIPng processes. I want to disable a few. I start them via ipv6 rip NAME enable I tried: ipv6 rip NAME disable no ipv6 rip NAME enable No idea, I didn't find anything on ...
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1answer
93 views

Cisco ASA 5505: Created a faulty NAT rule. Can't reach the ASA

I was trying to create a NAT rule to reach my internal web server from inside the LAN. Something must have gone wrong. Now when i try to reach the ASA through https://192.168.1.1 the response is from ...
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2answers
453 views

Cisco ASA 5505: Reach outside DNS address from inside

We use a Cisco ASA 5505 at our company. We have a dns A record (home.company.com) pointing to the external IP. In the ASA 5505 the http-port (80) is forwarded to an inside web server. No problem ...
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1answer
34 views

Increase dialup connection speeds

I'm currently manage a p2p dialup network like this: client computer==(ethernet)router Cisco 2500==(async port)modems----pstn----modem==dial-in server All things run well except the connection rates ...
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1answer
822 views

How to enable Cisco switch port mirroring without rebooting?

I have a Cisco WS-C2960S-24TS-S switch and would like enable a port mirror for network analyzer (such as Snort). I could not see any options in the GUI interface. Is it possible, and how do I enable ...
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1answer
74 views

Can I quickly disable access point radios in one building through Cisco Prime Infrastructure or wism-2 interface

We are hosting a robotics competition and they require that all of our wireless AP's be disabled for the weekend. I am wondering if there is a way to do this from our management software. Added ...
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1answer
134 views

cisco ios - syslog version

I am writing small article on Syslog and I was wondering, if there is any resource that tells me what version of Syslog is supported in what ios version? By Syslog version I mean rfc 3164/rfc ...
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2answers
77 views

How do you save the configuration of a Cisco switch?

I have a Cisco 2960s switch with 24-port 10/100/1000 Ethernet Switch with PoE, and I have set it up correctly (I think). I can't work out how to save the setting I have made because every time I ...
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2answers
100 views

How to connect more than one telnet session to Cisco router ( Port Com10 )?

I am working on connecting more than one telnet session to Cisco Router. I was unsuccessful till now and decided to post it for getting any valuable directions and info. Thanks
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1answer
269 views

Debug: Cisco VPN Router runs 100% CPU

I've turned logging on and all I am currently getting are Debug/Kernel logs. Nothing above debug. This was also during offsite hours when hardly any traffic was going on. I have also upgraded to the ...
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0answers
40 views

simple subnetting, regarding vpn

i am using 2 cisco rv180 to build up a ipsec tunnel. thats working. but i cant get any packets trough the tunnel. first i was using: local: 10.0.0.X 255.0.0.0 remote 10.0.1.x 255.0.0.0 but 0 ...
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2answers
269 views

VPNs and NetBIOS

I have a Cisco RV180 VPN Firewall Router and I have QuickVPN and PPTP working. However, I am not able to get NetBIOS working so that I can access everything via NAMES or get the systems to show up ...
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96 views

Site to Site to Site VPN

Just wondering if this is possible, we have a leased cisco 2911 (That I do not have access to) at that is set up with a site to site VPN to tie into a third party's Active Directory server. Our other ...
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2answers
131 views

Cisco 851W - recovering from corrupt configuration

While learning how to use my Cisco 851W router, I downloaded a configuration script with preconfigured settings. I ran this from the router and now I can no longer boot up and get to a command prompt. ...
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1answer
66 views

How to stop ISDN to connect automatically

Below is my BRI and interface configuration interface BRI0 ip address x.x.x.x xx.xx.xx.xx ip pim dense-mode encapsulation ppp ip igmp join-group 227.0.0.122 ip igmp join-group 225.0.0.45 ...
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1answer
718 views

Cisco QuickVPN Can't view local computers

I am connected to my QuickVPN connection to my RV180 VPN Router and I can access the router via IP but I can't find or see any of the computers. How can I fix that? Do I need to do some more advanced ...
2
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1answer
837 views

Dual ISP Inbound NAT — Asymmetric routing

routing question here. In a dual ISP scenario is there way to use both external IPs and nat them to a web server in a higher security level? The issue I am running into is on the return path for ...