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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4
votes
2answers
2k views

3 WAN and a Cisco Router - PBR, QOS, Load-Balancing

I have a cisco router with 4 ethernet interfaces, scenario is as follows : 2 x Dedicated Leased Lines (2MB and 4MB) 1 x Business Class DSL 10MB 4 3COM L2, Switches, connected to a Core Switch (3COM ...
10
votes
9answers
2k views

Why buy high end hardware firewalls?

There exist firewalls from Juniper and Cisco that cost more than a house. So I wonder: what does one get from a $10.000+ firewall compared to an 2U server with 4x 10Gbit network cards running e.g. ...
8
votes
3answers
12k views

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. ...
5
votes
3answers
9k views

Cisco 877 as a VPN server?

I have a Cisco 877 router which connects my network to the Internet using an ADSL line, a single public IP address and NAT; the IOS version is 15. Everything is working ok, but I'd like to configure ...
8
votes
1answer
6k views

Authenticate Linux sshd with TACACS+ (Cisco ACS)

Our network engineering team uses multiple linux servers for syslog collection, configuration backups, tftp, etc... We want to use TACACS+ on a Cisco ACS machine as our central authentication server ...
5
votes
4answers
1k views

Best way to improve resilience?

One of the major projects I have lined up for 2010 is attempting to mitigate some of the Single Point of Failures (SPOFs) in a network I currently manage. We currently have a single datacentre rack ...
4
votes
2answers
1k views

Network Redundancy Example

Looking for help filling in how redundancy in the following model might work: I believe my Datacenter will give me redundant gateways with two hand offs (going to have to talk to the more about ...
2
votes
1answer
226 views

complicated bonding and network question

I am not a network guy and would like to know how can I setup the below two configurations and their pros and cons: Networking component: -- WAN: Cisco 2970 * 1 Load Balancer: F5 switch 1600 * 2 ...
2
votes
3answers
281 views

Looking for a matrix of Cisco equipment

I used to have a very handy poster which had all of the Cisco equipment in matrix form which laid out which router had which interfaces and slots, with the same for the switch lines. Is there a ...
1
vote
1answer
2k views

Cisco ASA 5520 Unable to access external IP on Internal Network

I have an internal network of 192.168.0.x and I have a server nat'd to an external IP address we have. I can't figure out how I need to change my configuration for this thing to get it to work. I'm ...
0
votes
2answers
2k views

Cisco ASA - Configure External Access to a Server

I'm trying to configure my ASA (ASA 8.4(2), ASDM 6.4(5) ) to allow external access to a server (using RDP). I've tried everything, but it doesn't seem to be working. I'm sure it is something simple ...
3
votes
5answers
4k views

Are Arista SFP Transceivers Compatible with Cisco Switches?

Are the Arista SFP transceivers compatible with Cisco switches? For example, if I go to the CDW site they show multiple transceivers that vary in price. How can I know that they will work in the ...
2
votes
2answers
1k views

BGP Multihomed/Multi-location best practice

We're in the process of designing a new iteration of our network where we improve resilliency by adding a second datacentre. We'll be adding a second datacentre, with an identical configuration of ...
2
votes
2answers
1k views

Cisco PIX land attack

I am continouly getting errors log Deny IP due to Land Attack from IP to IP. Both source and destination IP address are same. Can any one please guide me what could be the issue and how I can fix ...
1
vote
1answer
537 views

Inside Users can´t reach the DMZ, as well as outside from my cisco ASA 5520 v.7

I'm configuring my Cisco ASA 5520 version 7 and below is the show run of the machine: ASA2> ASA2> en Password: ASA2# sh run : Saved : ASA Version 7.0(8) ! hostname xxxxxxxxxx domain-name ...
1
vote
1answer
3k views

massive packet loss when servers are brought online

This is a continuation of ubuntu server, ssh, write failed: broken pipe . I'm starting a new question, because I don't believe the issue is isolated to ssh/ubuntu. I've got two brand new servers ...
0
votes
1answer
119 views

Configuring a RADIUS server for 802.1x over a Cisco Switch

I am trying to set up RADIUS authentication over a Cisco switch and I have gone through every tutorial they have. I am able to get the RADIUS server to authenticate when I access the CLI of the Cisco ...
0
votes
1answer
2k views

Cisco ASA 5505 Voice/Data VLANs not pinging/routing

Hi i am very new to Cisco ASA 5000 series and have two interfaces that i would like to route between, a data network 192.168.69.0/24 and voice 192.168.70.0/24, I have addded both and can ping the ...
0
votes
2answers
340 views

Set up a GRE tunnel with Cisco PIX-506 v6.3

I'm trying to establish one half of a GRE tunnel, the other being configured by my service provider. I have a Cisco PIX-506-E running Firewall version 6.3(5). Provider Router Public IP: 8.8.8.8 My ...
0
votes
1answer
464 views

Outside or Internet users canot reach my dmz

Hi everyone out there. I have configured my aa 5520 v7. and so far im facing a problem in my connection and therefore i wish someone here can help me to sort it out. wright now Internal network can ...
0
votes
2answers
511 views

Cisco Catalyst 65XX and traffic shaping

I have Cisco Catalyst 65XX, many VLANs and about ~1300 users. Users connected to some D-Link switches with second-level management. D-Link switches come to my Cisco Catalyst 65XX by VLANs. So, how I ...
-1
votes
1answer
259 views

Network load balancing: LACP between Debian & FreeNAS over Cisco Switch doesn't work

My setup: 2 Debian Server, with Bonding 2 Storage Server FreeNAS with Link Aggregation 1 Cisco Switch SG-200 with LAG enabled MTU 9000 enabled everywhere Result: Network performance is still single ...
-1
votes
1answer
2k views

cisco 2500 series controller keeps dropping devices

I have a cisco 2504 controller with 3502 ap's. This is all configured and works a lot faster than our old system already except these seem to drop clients every 20-30mins or so for a few seconds. ...
7
votes
6answers
5k views

Cisco VPN Client for Windows

is there any Free Cisco VPN Client software for Windows ?
7
votes
3answers
7k 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 ...
11
votes
8answers
28k views

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 ...
5
votes
3answers
4k views

Unable to connect on natted server from a host computer on the same LAN using public IP address

I have a server statically NAT’d using a registered IP address and it is accessible from the outside. The problem is I cannot access my server from the inside using the registered IP address with a ...
3
votes
2answers
5k views

QoS for Cisco Router to Prioritize Voice and Interactive Traffic

I have a Cisco 891W NATing Voice and Data to the internet over a 10mbit/2mbit connection. Voice traffic gets degraded when I upload large files. Pings time out as well. I tried to configure a QoS ...
6
votes
2answers
2k views

DMZ subnet: to NAT or not to NAT?

I'm looking at setting up a DMZ behind a Cisco ASA that will contain a large number of HTTP front-end load balancers and SSL offload services - over 100 IPs, concentrated on a smaller number of hosts. ...
6
votes
4answers
1k views

Is Selling Old Cisco Routers a Security Issue?

I'm a system admin but I'm not Cisco certified and I'm not a network engineer. Basically I only use switches/routers/modems with a GUI. I've inherited a pile of old Cisco routers that are not in use ...
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 ...
5
votes
3answers
1k views

How do ISPs/Colocation Facilities limit bandwidth for Ethernet Drops?

I have switch providers and have run into some problems with bandwidth limitations. I have more bandwidth then before, but there are performance issues. The router is connected to a 100mBit port, ...
4
votes
3answers
29k views

What is a Cisco BVI interface? What is it used for?

I have been Google'd and searched for the answer to these questions, but I cannot find a simple answer. So my questions are about BVI interfaces. What are they? Why do you use them? In what scenario ...
4
votes
1answer
962 views

ASA 5505 vLAN Routing - 2 LAN 1 WAN

I am setting up a Cisco ASA 5505 with the base license. TCP/UDP communication works from inside->outside, outside->inside, inside->secure, which is my desired traffic security. HTTP, SSH, and other ...
3
votes
1answer
1k views

Cisco ASA 5510 Time of Day Based Policing

I have a Cisco ASA 5510 setup at a boarding school. I determined that many (most?) of the students were downloading files, watching movies, etc, during the day and this was causing the academic side ...
3
votes
2answers
935 views

Cisco QoS Guidance

I have a 10M connection to the internet that is hooked into a 100M port. I am getting started with QoS, and am hopping for a little guidance on setting it up on a Cisco 3825 router. Right now I am ...
2
votes
2answers
1k views

Cisco Router - Website Doesn't Work Locally Because Public IP Directs to Router Itself!

I have an RV220W but this issue may apply to other Cisco routers. My website is deployed at public IP address 123.45.67.89/MyWebsite/Default.htm. My web server has an internal IP to which port ...
1
vote
1answer
785 views

Pushing IP routes to various VPN clients

With OpenVPN there is a well-known option "push" which allows to push an IP static route from the server to a connected OpenVPN client. I would like to know if there is an equivalent of this option ...
0
votes
6answers
3k views

cisco router : redirect any dns request to my own dns server

how I can redirect any DNS request from the client with my Cisco Router 2621XM. I want to redirect any dns request to my own dns server. So if the client has set the dns server in their ip address ...
6
votes
4answers
1k views

Cisco IOS QoS prioritize SSH but not SCP

How can I prioritize ssh traffic to ensure low-latency but throttle SCP file transfers? I'm looking for a solution that is not host specific so I don't have to add lists of IP addresses. Thanks!
3
votes
2answers
183 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 ...
3
votes
1answer
539 views

Why do modern routers not require clock settings anymore?

From my Cisco books (CCNA level) I learned that in a WAN connection one router must be configured as the DCE and the other as the DTE. In real life I have a DS-3 between two routers. There are no ...
3
votes
3answers
12k views

Cisco ASA logs “regular translation creation failed for icmp …” for DNS traffic, yet it works

Every few minutes our Cisco ASA 5505 firewall is logging errors that I can't figure out with my limited Cisco experience. Severity Date Time Syslog ID Source IP Destination IP ...
3
votes
5answers
517 views

The right vpn to replace heavy ssh usage

We are a small development firm looking to access the following services remotely: http smb network shares rdc / vnc Currently we do this with a lot of ssh tunnels. We are looking into switching ...
3
votes
4answers
593 views

Free (as in beer) Cisco VPN equivalent for Linux client

I have several customers that I connect to via Cisco VPN Client (v5 if that matters) on Windows. I'm doing some tidying up and was wondering if there was a simple way to be able to connect to the same ...
2
votes
3answers
747 views

Ping only works after about 30 seconds

Today I am working on this issue and I would love your ideas. There is a network with something like this LAN 1 -- WAN CHANNEL--- LAN 2 The LAN 1 have two segments. When I make a ping from LAN 1 ...
2
votes
1answer
1k views

Cisco ASA Nat 8.4

I'm trying to get port forwarding on my ASA working. I'm using: object network server1 nat (inside,outside) static interface service tcp 25 25 and an access list, and it works fine, however, I ...
2
votes
2answers
4k 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 ...
2
votes
6answers
948 views

Non official Cisco VPN client for Linux

Does anyone know of a good VPN client that is not the official one from Cisco for Linux? Best Regards, Anders
2
votes
2answers
2k views

Simple road warrior IPv4 VPN configuration in Cisco IOS

I'm looking to setup a reasonably simple road warrior VPN configuration on our Cisco routers. Frustratingly, I've been searching for this but cannot find a simple complete guide. Multiple (not ...