Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [cisco]

Cisco is a provider of switches and routers to commercial consumers. Cisco devices run IOS or NX-OS operating systems. 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.

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

Since Cisco acquisition of Linksys, the consumer line of switches, firewalls and routers (which do NOT run IOS) have been rebranded under the Cisco name.

This tag is a generic tag - Wherever possible a more specific tag related to the product you are using should be used instead. For example:

, , , , ,

2629 questions
1
vote
2 answers

Cisco Aironet (802.11n models): how to put a WEP128 ssid and a WPA/WPA2 ssid on the same radio?

I'm using a Cisco AIR-1252AG (IOS 12.4(10b)JDA3) and I must provide both a WEP128 wlan (for compatibility with older embedded devices, this will go to a firewalled vlan) and a WPA2 (WPA1 would be ok too) wlan on the same 2.4GHz radio. Both with pre…
Luke404
  • 5,826
  • 4
  • 47
  • 58
1
vote
2 answers

Cisco Catalyst 3550 + Alteon 184 Load-Balancing Issues

I have just deployed a couple Cisco Catalyst 3550 switches, and a couple Alteon 184 Web Switches for load-balancing. I can ping all RIPs and VIPs to/from the Alteon. Topology Before: (server) <-> (Alteon) <-> (Internet) Topology Now: (server) <->…
upkels
1
vote
1 answer

Route additional network through Sonicwall site-to-site VPN

I have a sonicwall site to site vpn. At one of the sites there is another Cisco vpn to another site. I need to route the traffic for the cisco vpn through the site to site from the other sonicwall site. Site A - 10.10.0.0 /16 network Site B -…
Brandon
1
vote
2 answers

Any issues with a Static NAT mapping and overloading to the same IP with IOS?

Let say an ISP gives me 12.12.12.0/28, and I have an internal network of 10.10.10.0/24. If I run a webserver on say 12.12.12.1 and have that statically mapped to 10.10.10.12, is there any problem with also making 12.12.12.1 my nat overload IP for…
Kyle Brandt
  • 83,619
  • 74
  • 305
  • 448
1
vote
2 answers

Cisco ASA 5505; Can't forward port 443: Why am I getting "Error: unable to download policy"?

I'm dealing with my first Cisco ASA (a 5505), using the ASDM interface. I've got to forward HTTP, HTTPS, PPTP and another port to a couple of internal servers. I'm pretty sure I've got it all figured out, and have successfully (I believe, haven't…
techie007
  • 1,894
  • 17
  • 25
1
vote
0 answers

Internet failover on Cisco ASA 5500 series Primary ISP is on DHCP address and so is backup. Always defaults to backup

I had SLA MONITOR setup on my ASA and working fine for months. All traffic was routing through my primary connection. I rebooted my ASA after a firmware upgrade. When it came back, it would always default to the backup line. I disconnected the…
c240amg
  • 11
  • 1
1
vote
0 answers

Werid ESXi host mac flapping issue

We have some standalone ESXi hosts in our company. Recently we encountered a werid issue where the mac address of the ESXi host flapping. Issue description: I found that the IP of some esxi hosts will occasionally be unable to ping, but the vm…
Satan023
  • 11
  • 1
1
vote
1 answer

configure cisco catalyst 3560g with an egress uplink

Currently my setup has our egress uplink connected directly to an external interface on a linux router/firewall/nat gateway. Since the linux box is a single point of failure, I've since setup two openbsd boxes using carp+pf+pfsync in order to gain…
imaginative
  • 1,971
  • 10
  • 32
  • 48
1
vote
1 answer

Ansible to a Cisco Router :: Password Message Messing Up the Connection?

When I manually SSH from my Ansible server to a Cisco router, I see this on the command line: me@ubuntu01:~/ansible$ me@ubuntu01:~/ansible$ ssh user01@10.10.10.101 Password: ####################### Cisco Router 101 ######################## Hi,…
Pete
  • 131
  • 6
1
vote
1 answer

Cisco router 1841 and VPN

I have Cisco 1841 router with SDM. Our ISP allocated us static IP. Now I would like to setup VPN so that staff can work remotely. We are going to use Terminal service for this. But how to setup VPN using Cisco router? I know you can allocate RAS/VPN…
Hemal
  • 325
  • 1
  • 3
  • 11
1
vote
1 answer

Ansible: Pulling a specifc piece of information from an output

I'm trying to grab some information from the output of a playbook and save in a file for review. tor.j2 is just a list of expected lines in the config: logging , ntp, spanning-tree, etc. tasks: - name: Check the config nxos_config: …
JonC
  • 11
  • 2
1
vote
0 answers

Possible STP Issue with Cisco SG350 Switches

we are having a weird issue with a network of Cisco SG350 Switches that I cannot figure out. We are thinking it may be related to STP but have verified all the normal problem points (i.e. proper ports are showing as Root / SmartPort disabled /…
devGuru
  • 11
  • 1
1
vote
1 answer

Blocking SSH access from WAN side of CISCO 890 to management plane

I've been round about the houses with this one for days, i've not found a solution yet that works. I haven't found a way to block the HTTP access to the management plane either, i had to give up and disable it completely. In my show run: ip…
Owl
  • 121
  • 6
1
vote
0 answers

Linux is answering (wrong?) to Gratuitous ARP message

I've a Centos 7 Linux server with 2 physical interfaces, each of them has 2 subinterfaces, which are P2P /31 interfaces two Cisco. After changing neighboring Cisco devices Linux router started to incorrectly answer the gratuitous ARP packets from…
Edvinas
  • 63
  • 8
1
vote
1 answer

Bad mask /30 for address 10.1.1.3 || Cisco P.T

So basically I'm having this issue while trying to configure the serial of 3 routers (router0, router1, router2) on Cisco Packet Tracer I was able to configure both serials for router0 following this configuration: Router(config)#interface serial…
Roy Najar
  • 13
  • 3
1 2 3
…
99 100