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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How to setup a static multicast ARP entry with Cisco SG300?

We're running a Microsoft NLB cluster in multicast mode as a loadbalancer. Using our old Cisco IOS switches we propagate access to the cluster to our branches using a static ARP entry in the core ...
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2answers
202 views

What does 'Si' mean with respect to network switches?

I am seeing references to Multilayer Switches with Si as in the network symbol below. What does the 'with Si' qualifier mean?
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How to properly add guest essid to cisco AP and asa5505

I have an ASA5505 configured with an inside and outside interface and DHCPD for the inside interface. Currently I have a cisco AP (forgot the model) broadcasting only a single essid for the internal ...
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5answers
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ASA 5505, is BGP supported?

I need to configure BGP on an ASA 5505, according to certain sources it isn't supported, yet I can find resources on the internet giving information on how to configure BGP. I'd really like an ...
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2answers
14 views

Can a cisco router execute a command itself?

I'm experiencing a problem with my Cisco router 1900 Series, the router sometimes stop routing packets, and when i log into it and show the running-config i see no ip routing executing ip routing ...
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55 views

Incoming Connections with Two ISPs and Cisco 2911

I am a relatively beginner Networking Guy and I have managed to set up a Cisco 2911 router with two ISPs (no BGP), NAT and route-maps (although I don't really understand them) to the two up links with ...
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16 views

Is there some opensource IPsec server compatible with cisco vpn client? [on hold]

I need some opensource IPsec server compatible with cisco vpn client to simulate network issue. I tried OpenSwan and SoftEther, but they are not compatible. Are there some other? Or maybe I should try ...
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1answer
651 views

Gre Tunnel Cisco Linux traffic forwarding

I setup a gre tunnel a cisco router and a Linux machine, the tunnel interface in the Linux box named pic. Well i have to forward traffic coming from cisco through the Linux box. the rules i've set in ...
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1answer
21 views

Cisco IOS Show | Filter | redirect

I am new to Cisco IOS and I have one question that I have come across. Please reference this thread. Reference The answer to that thread states that in Cisco IOS you can run a command, filter it down ...
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1answer
21 views

Cisco Router not displaying DHCP client hostnames

I've got a branch office configured to issue IP address from a Cisco Router (IOS 15.0). The router is successfully issuing DHCP addresses just fine. My questions is that when I issue the command "sh ...
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13 views

CISCO SWITCH AND TELNET — 2 [on hold]

I need to configure my cisco881 as below after i write "ip address 192.165.1.1 255.255.0.0" the telnet session is disconnected i have ping to 192.165.1.1 but can't access via telnet what should i do ...
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2answers
37 views

Possible to use a console cable from a Cisco ASA and use it interactively with ESXi?

I'm creating procedures to deploy a Cisco ASA and an ESXi machine to remote locations where no local tech contacts are available. I think it may be a wise idea to connect the console cable from the ...
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1answer
34 views

Cisco 7604 router runs out of memory when loading the IOS image, yet runs a different image with similar reqs

I am experiencing an unusual memory issue with a Cisco 7604 router, specifically the memory on the Supervisor Engine (SUP32-GE-3B) and how it pertains to IOS requirements. I was preparing the router ...
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1answer
55 views

can anyone show me how can i fix error with my NAT config

Can anyone help me with my packet tracer problem? My network 2 buildings (each building has 3 vlans) on the same side and it has 2 sides, between is internet. I finish with DHCP and now I try to ...
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1answer
1k views

VPN and overlapping subnets

I have a number of Cisco site-to-site VPNs between using ASA and Pix devices established for my clients. This is a hosted application and I need for the entire address range on the client's network to ...
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1answer
1k views

Setting up Splunk/IronPort WSA

I recently stumbled across Splunk 4 (by way of an advert on this very site...) and found that it had an "App" that's designed to work with Cisco IronPort WebSecurity and E-Mail Appliances! That's ...
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21 views

my cisco 877 has problems to adsl syncing?

I have a cisco 877 modem/router but I have some problems to configure it for my adsl. When I plug in the rj11 cable, the "CD" led begins to blink but it does not stop to blink, imho means it has ...
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1answer
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Can I regenerate the rsa key for SSH access to a Cisco router? Or should I completely erase the SSH config?

I have a production 2691 that I administer via telnet. I'd like to change that to SSH. Looking at the config, it looks like there have been keys generated in the past. I think the history here is ...
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1answer
725 views

cisco CUCM 8.6.x configuration export

We currently have a Cisco server running CUCM and cannot get access to the system due to a 'Database communication error' received when attempting a log in to CUCM homepage. Is there any way to ...
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1answer
56 views

How to install and run Puppet Device in order to configure Cisco Switches and Routers?

According to this documentation it should be possible to configure a Cisco Switch by using the Puppet Module Device. Where could this module be found? Is this module restricted to Puppet ...
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2answers
30 views

Point of Shared Secrets on RADIUS Servers over a Cisco Switch

I was wondering what the point of Shared Secrets are on RADIUS servers if I set the secret in the Cisco switch configuration. If the supplicant wanting to be authenticated does not have to know it, ...
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1answer
3k views

IPsec Tunnel Between Cisco and XP, Quick Mode fails When Initiated By Router

I have been trying to set up a IPsec tunnel between a router and my Windows XP box. The router is 192.168.254.30, and the XP machine is 192.168.254.128. However, I can't seem to get the tunnel ...
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1answer
106 views

Cisco ASA 5505 No LAN access through VPN

I have been fighting with this ASA 5505 for a days now. I am verly new to networking and need support by the community! I have completely configured the CISCO 5505 allowing me to browse the internet ...
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2answers
2k views

Cisco Aironet 1200 (AIR-AP1231G-A-K9) issues

I bought a Cisco Aironet AIR-AP1231G-A-K9 off of ebay and am having issues with it. The first and most alarming issue is the cycling of the status lights. I read the manual and it does not show that ...
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50 views

How to configure a Cisco Catalyst 2960 to synchronize with an NTP server

I would like to synchronize a Cisco Catalyst 2960 series switch with a publicly available NTP server such as time.apple.com. I have reviewed the knowledge base article here: Catalyst 2960 ...
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2answers
870 views

VmwareESXi Vlans, Cisco devices and broadcast making the things odd

I'm having problem for some days trying to make a correct configuration Right now I have a Cisco Catalyst switch, a Cisco Router 2811 and a VMware ESXi node with 4-8 VM (Linux,BSD, Windows), each ...
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1answer
30 views

Cisco ASA: port forwarding to different IP depending on client IP/subnet outside

I have Cisco ASA 8.2(5) and would like to configure port forwarding. Cisco ASA has 2 interfaces: outside with IP 192.168.57.2 inside with IP 192.168.1.1 I have two subnets reachable through ...
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0answers
36 views

Watchguard to Cisco VPN

I am trying to setup a site to site VPN. I can see the tunnel is up but i'm unable to ping across the VPN. The other end is a watchguard. Current configuration : 8098 bytes ! ! Last configuration ...
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2answers
2k views

Configuring Frame Relay using a Switch Simulation - Packet Tracer

I have the following set up in Packet Tracer: I am trying to configure frame-relay between the RTR-EDGE router, the RTR_ENG router and the RTR_SAL router using a frame-relay switch simulation (the ...
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1answer
23 views

RADIUS authentication requests not relayed to RADIUS server

I am trying to set up a RADIUS server for 802.1x NAC over a Cisco IE 3000 Network Switch, using freeRadius to implement it. I know the switch knows where the RADIUS server is because I set up the ...
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1answer
1k views

Cisco 1142 AP not joining WLC

I have one an issue that I would be extremely grateful for help with. When I check the AP join statistics I see the following: Reason For Last Unsuccessful Attempt RADIUS authorization is pending ...
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4answers
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Cisco ASA user authentication options - OpenID, public RSA sig, others?

My organization has a Cisco ASA 5510 which I have made act as a firewall/gateway for one of our offices. Most resources a remote user would come looking for exist inside. I've implemented the usual ...
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2answers
766 views

XenServer 6.0.2 and Cisco 3550 vlan configuration

I am running a couple of xenserver 6.0.2 hosts with multiple vm's on them. All the xen hosts have 4 physical network ports connecting to the cisco. Each port is untagged in xen but is tagged to a vlan ...
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3answers
271 views

Having ssh access only, determine if the device is router or a switch (Cisco and Juniper)

There are some Cisco and Juniper devices on our network that I need to make a python script to determine what they are: switches or routers. I have ssh access, so I can show version and parse ...
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2answers
84 views

MTU between Juniper and Cisco, cause of packet loss?

This office has a network consisting of Cisco Catalyst and Juniper EX L3 switch. Cisco Router and Juniper L3 switch share a OSPF area in between them. Hosts on Juniper side are running FTP servers ...
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1answer
66 views

Packet loss on between firewall and uplink?

I have a moderately complex network topology between my external firewall and the internet, as shown below. Every so often - I haven't found a pattern yet - we're getting a significant degree of ...
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1answer
667 views

Cisco - Port's configured trust state is now operational

I am looking at a Cisco switch's log at work and am a bit confused by how verbose it can be at times. For instance, we use automatic QoS here and I often see this when phones are plugged: Mar 18 ...
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Cisco E2500 Wireless Router - Guest network always open

I can't for the life of me figure out why the guest network stays open. I have a password configured, and the main network is secure. I can enable/disable the guest network, and access is ...
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1answer
31 views

Version of IOS for Cisco 2900 series? [closed]

Can someone please provide the current version of IOS for the Cisco 2900 series router? I'm having trouble figuring this out based on Cisco's documentation. Thanks.
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Cisco ASR 1001 RTU licencing - not applying correctly?

We're in the middle of deploying a Cisco ASR 1001 for use with a GRE/IPSec VPN tunnel. Whilst we've got the device we're waiting on e-delivery of the licences however looking at: ...
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30 views

Untangle running on ESXi sending tagged VLAN to Cisco switch not working

basically here is my setup: [Host A] = A hypervisor running ESXi 5.0 [Switch A] = A Cisco 2960-S Series 48 port switch [Switch B] = A Cisco 2960-S Series 48 port switch [P-Router] = *A physical ...
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5answers
1k views

Are Cisco admins expected to understand classful networks?

While studying for the CCENT exam, my reference materials have made an alarming number of references to class A/B/C networks. Thankfully they just treat Class A/B/C as shorthand for /8, /16, and /24 ...
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2answers
1k views

Setting up VPN on CISCO ASA with private IP on outside interface

I am trying to setup our ASA 5510 to allow IPsec(IKEv1) access to the inside network through VPN. The hard part about our setup is the outside interface does not have a public IP address assigned to ...
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1answer
27 views

PoE from 2960 without Layer 1 Connection

I'm attempting to use a Cisco 2960-X (LPS-L) to provide power for a some Nexus 7 tablets (via a TP-LINK PoE Splitter). The issue is that without some actual device connected to the LAN port of the ...
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1answer
45 views

Cisco ASA VPN with static addresses

We have a group of machines that connect via the AnyConnect VPN software and get assigned a specific IP address. We then have software that sends data to that machine based on that IP. However, we ...
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12 views

Cisco ASA Access anyconnect from inside IPsec tunnel

I have a Cisco ASA on a dynamic WAN IP with a IPsec site-to-site tunnel to a remote linux host in a datacenter with a static WAN IP. All non local traffic is tunneled and the datacenter end is the ...
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3answers
220 views

Native VLAN mismatch and missing VLAN?

I'm trying to wrap my head around what exactly is going on here with a new site's configuration of their networking stack. This particular piece I am working is pretty simple but I having a hard time ...
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1answer
722 views

Setting Up A Windows 2008 NPS Server As A Radius Server For A Cisco AP541N Cluster

I have a cluster of Cisco AP541N access points. I am trying to use the Radius authentication for WPA-Enterprise authentication, but I cannot get the APs to query the server properly. Does anyone ...
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2answers
35 views

Cisco IOS - Stuck in Read Only Mode

I can't figure out what happened but I can not enable privileged mode in my Cisco 3750. At first, I tried: enable to enter EXEC mode. My password would not work and it kicked me out after 3 ...
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2answers
838 views

Unable to PPTP through NAT on Cisco 881

I'm trying to connect to a PPTP server which is sat behind a Cisco 881 NAT router. The server is running Ubuntu Server 12.04 and is running Poptop pptpd as the PPTP daemon listening for connections. ...