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.
4
votes
2answers
872 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 ...
7
votes
9answers
1k 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. ...
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
1answer
2k 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 ...
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
176 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
269 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 ...
3
votes
5answers
2k 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
967 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
851 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
432 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
2k 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
714 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.
...
0
votes
1answer
860 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
223 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
256 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
1k 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 ...
0
votes
0answers
1k views
Configuring a Cisco ASA 5520 V7
I need to replace a 1700 Cisco router with a Cisco Asa 5520 firewall version 7. Before I make the switch, I want to be sure everything is working properly. I'm open to all suggestions.
What i need ...
0
votes
2answers
467 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 ...
7
votes
6answers
5k views
7
votes
3answers
3k 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 ...
5
votes
3answers
7k 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 ...
11
votes
8answers
27k 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
3k 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
4k 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
4answers
652 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
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
1answer
3k 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
932 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
1answer
14k 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
757 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
969 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
785 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
804 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 ...
0
votes
6answers
2k 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 ...
3
votes
1answer
278 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
2answers
8k 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
497 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
504 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
325 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
2k 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
5answers
1k views
Link aggregation with DSL and Ethernet, and different ISP's?
We're a webdev company that has outgrown its ADSL bandwidth. It's currently 4/1 Mbit/s and due to distance we can't simply get faster DSL, whether ADSL or SDSL. Stacking multiple DSL connections is ...
1
vote
4answers
149 views
new Catalyst 2950 switch, no console or telnet CLI access
I am connecting a brand-new Catalyst 2950 switch to my LAN. It is on with green lights, and frames successfully go in and out the ports. The switch is on the same LAN has my host PC, and pings are ...
1
vote
2answers
260 views
Web server hardware firewall recommendations
I'm looking for a specific hardware firewall model solutions that best accommodate the following concerns [Cisco models are best, because our colo can get good deals on them reconditioned]:
There ...
1
vote
3answers
207 views
Where to Learn CISCO Router Configuration
I'm looking for a course on learning how to use CISCO Commands to configure a Cisco router. Can someone advise me on how I might get started in learning this topic?
1
vote
1answer
1k views
How do I use ISDN debug on a Cisco router to troubleshoot PRI phone issues?
We have a Cisco 2811 with UCM E 7.0 running our phone system. It is connected to the PSTN by a VWIC2-1MFT-T1/E1 card connected to a PRI from the phone company.
From time to time of late, we are ...
1
vote
4answers
1k views
Influencing outbound routes on multi homed BGP setup
I have a multi-homed network setup. I'm using a Cisco 7200 to do BGP advertising to both provider A and B. For each provider, I have a separate /24 that I'm using. I am AS prepending to influence ...
0
votes
1answer
156 views
Cisco 877 ISR - Joining to another local network
At a remote site I have a Cisco 877 ISR providing network services (DHCP, DNS, internet, VPN back to base). I need to connect it to another companies LAN at the remote site to allow uses to print on ...
9
votes
2answers
1k views
Is my Cisco switch port bad?
I've been chasing a packet-loss and network stability issue for a handful of end-users on an internal network for the past few days... These issues surfaced last week, however the location was struck ...
