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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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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2answers
3k views

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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0answers
11 views

Strongswan to Cisco ASA

I have a problem with connection two nets with IPsec. On the one side is Cisco ASA 55xx on the other TP-Link router with Debian 8.3 with StrongSwan behind the NAT. The problem also that I have ...
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23 views

VLAN Cisco Packet Tracer

Im creating a VLAN and i have connected everything right but I need to use the classfull C network 192.168.0.1 and subnet it to 4 equal size network.. So far i know the first IP on PC0 & PC4 I ...
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1answer
1k views

LAN to LAN (Tunnel) VPN with IPSec

I'm having some issues setting up a LAN-to-LAN VPN. Please keep in mind, that "the other side" won't change anything in their configuration. This is my current setup: Our side: Router: Draytek ...
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7 views

Ping between 2 mac-mini's via a DPC3941B is terrible, but worse if one is killed [on hold]

I have two mac-mini's on the same wifi subnet, the router is 30 feet away. If I set these two boxes to pinging each other, I get very slow response from one on the right (300-400ms), and inconsistent ...
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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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1answer
16 views

RV325 to RV320 site to site ipsec tunnel

Gateway to gateway tunnel from RV325 to RV320 (either direction) won't connect. I can't find any sort of error log. Both are WAN1 (only one connected) and IKE PSK. Both local and remote groups ...
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1answer
15 views

Cisco Nexus 7000 Multicast IGMP Snooping enabled - packets got to all interfaces

I have connected three servers to Cisco Nexus 7000 switch. Server1 send multicast packets, server2 subscribes to multicast packets and server3 is for the tests. No matter if I subscribe to multicast ...
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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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29 views

How to get Cisco Router on Network Map

I have a Cisco 1921 router that I want to show up in Windows Explorer (under Network Infrastructure) and on the network map. Would this be possible with this type of router? My Cisco wireless routers ...
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1answer
116 views

Routed port on BNT 8124 (Blade Networks/IBM switch)

How can I create a routed port on a BNT 8124? I need to create a /30 routed link between the BNT 8124 and a Cisco 4948 I have a port configured with: interface port 22 name "BNT_Routed_Link" exit ...
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1answer
48 views

Cisco SG200-26 - Can't change management VLAN

I've purchased a new SG200-26 switch and upgraded it to the newest possible version: I configured multiple VLANs - nothing special - however if I try now to change the management VLAN (as I did ...
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1answer
23 views

Catalyst 2960-X no xmodem or tftp transfer

I tried to upgrade the IOS on a Catalyst 2960-X stack with three members. The upgrade failed and left me with three switches without bootable files. So I connect to the rommon via console using ...
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1answer
39 views

First ping (to any destination) fails from switch but not from router

I've got a basic network setup, just doing NAT to a single public address to an internal /24 without any VLAN's or fancy routing. Both my router and switch are running Cisco IOS 12.x. My ...
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2answers
1k views

Problems with getting both ingress and egress Netflow data

I have a Cisco 6500 switch that I want to capture all vlan8 traffic incoming and outgoing. I talked with my networking group and they set me up with the following commands. (May not be exact commands ...
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2answers
35 views

What do I need to do to enable sFlow on my Cisco Nexus 9372PX?

I have a pair of Cisco Nexus 9372PX switches running NXOS version 7.0(3)I1(3). According to the link at ...
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1answer
37 views

invalid password at my Cisco 2961 router

I am going crazy here! I set a password at my router and I can't think of anything that could be wrong! I even saved the configuration before I got locked out of the router, I will share it with you. ...
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0answers
27 views

Site to Site VPN one-way traffic Azure <-> Cisco ASA

We have a site-to-site static routing VPN (classic VPN, not ARM) attempting to connect to a remote Cisco ASA 5555 (a supported VPN device). The on-premise network can successfully initiate the tunnel ...
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1answer
999 views

Cisco 887VA Port Forwarding Not Working

I have a Cisco 887VA connected to our BT Business Broadband line. We also have another modem on a seperate connection which also handles our DHCP. The Cisco is plugged into our network switch, as is ...
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0answers
6 views

Cisco VWLC redirect page without authentication, radius or dhcp?

I have a virtual Cisco CMX sytem for the tracking of customers in a smalland a virtual Wireless Lan Controller also from cisco, in it's webconfigure I can choose for it to redirect to a webpage we ...
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3answers
27 views

Cisco IOS NAT assistance

I am a cisco newbie, I have configured VLANS, dhcp, can get an IP address on my local machine. I can't seem to get out to the internet from said machine. Am I missing something in my NAT setup? ...
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1answer
42 views

Forwarding IPs to Switch for NAT

I have a Question. We actually have a Cisco 1812 Router and we're Switching to an ASA 5512-X. The Problem is, the ASA 5512-X only has 6 Ports. The 1812, had 8. All in use. We need to translate 3 ...
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0answers
13 views

Configuration of VLAN for managing computers on the other side of a switch?

I have a modestly smart Cisco SG200 switch connected to our institute's Ethernet network. To this switch, I connected four Linux and Windows computers. (So, the configuration is: one network ...
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20 views

Can't route traffic from Cisco to Asterisk over port 5060

My VOiP provider has informed me that I must route incoming calls from my Cisco router to my Asterisk server to port 5060. I can ping my Asterisk server from my Cisco router fine, there's a direct ...
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2answers
2k 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. ...
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0answers
24 views

Creating additional VLANs on Cisco SG200

I would like to create 2 separate VLANs using a Cisco SG200-series smart switch (layer 2) where the devices would not see each other, while being able to connect to the internet. The setup is simple, ...
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1answer
3k 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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1answer
1k views

VLAN & WiFi & DHCP with Cisco SG200

I'm trying to configure a small business network with one Cisco SG200-26, a Linux server and two TP-Link TL-WA801ND. I have set up the APs to have two different SSIDs, Public and Staff, and have ...
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26 views

Cisco vpn connect failure [closed]

I am trying to connect through Cisco Anyconnect secure mobility client to my office vpn site but getting this error: The IPsec VPN connection was terminated due to an authentication failure or ...
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1answer
1k views

Find client IP connected to VLAN from Cisco Catalyst 3600 by SNMP

I would like to get using of course SNMP, list of client IPs connected to VLAN in Cisco Catalyst 3600. So far, I have pseudo-algorithm made by me which obtains those IP addresses, but I am not sure ...
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16 views

Setting up Cisco ASA VPN to use both radius and local users

I've got a Cisco ASA setup with L2TP/IPSec VPN, all is working well except for one minor issue. Ideally, I'd like to be able to log on to the VPN using either that RADIUS server users or the local ...
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2answers
2k views

How can I configure my network to allow bi-directional traffic between two lans?

Here's my current setup: (and it may require reworking): 2 LAN networks - 192.168.41.0, 192.168.21.0 2 Public IP's (they are assigned to us by specifying MAC Addresses - not subnetted) ...
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1answer
36 views

Cisco Router - How do I host multiple websites with one public IP

I'm having some difficulty configuring my Cisco 4300 Series router to host multiple websites with a single public IP. I have created my access lists, but the techs over there tell me I must have one ...
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1answer
12 views

%Invalid interface type and number

I am trying to apply a scenario from the Cisco CCENT book where a 2811 Router uses VLANs. I have applied the network as is in the book inside my Packet Tracer. Here is the section in the book and ...
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1answer
1k views

Cisco Nexus syslog messages format?

I'm trying to normalize Syslog messages generated by a Cisco Nexus box. Problem: Messages have the following format: <189>: yyyy mm dd hh:mm:ss UTC: text This is not a standard Syslog message, no ...
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1answer
18 views

Cisco SG200-50, accessing a network printer from 2 VLANs

The requirement is to create an additional (guest) VLAN (a Cisco SG200-series smart switch is used) so that the devices on the guest VLAN could not see those on the internal network (the default ...
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34 views

Cisco WAP321 dropping ARP packets

At my office we have 4 WAP321 connected directly to a Cisco 891f router. Randomly throughout the day, computers will lose access to the network. They will remain connected to the Wifi SSID, but can't ...
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1answer
6k views

Cisco ASA Site-to-Site VPN Dropping

I have three sites, Toronto (1.1.1.1), Mississauga (2.2.2.2) and San Francisco (3.3.3.3). All three sites have ASA 5520. All the sites are connected together with two site-to-site VPN links between ...
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1answer
34 views

ASA 5510 Secondary Public IP Range on outside interface

We are in process of upgrading from an ASA5505 to an ASA5510. I have a co-location configured for 3 ranges of public IP addresses on two different subnets. The 5505 is working as expected. Example ...
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1answer
1k views

Cisco 3750 switch wont transmit radius request to server

We have a radius server running on our lan and i am able to authenticate against it through direct link to the server. However when we want our clients to connect through our switch (cisco 3750 ...
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1answer
25 views

Cisco Aironet 1200 dhcp relay config

It's about 6 years since I last configured an IOS device and I have forgot a lot of it sadly! I got a Cisco Aironet 1200 AP ( IOS (tm) C1200 Software (C1200-K9W7-M), Version 12.3(2)JA2, RELEASE ...
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0answers
21 views

Site to Site VPN connection is not established between cisco routers in GNS3

guys. In a Scenario I'm using sokootRtr1 as CA server and sokootRtr2 as CA client. As the following, both routers have their digital certificates; sokootRtr1#sh crypto pki certificates CA ...
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0answers
15 views

Cisco Switch Routing performance monitoring

It is quite a question for me: I have Cisco Catalyst 2960S switch which is nice hardware even despite its age and EOL. I'd like to set it as small router between several networks within a remote ...
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4answers
3k views

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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10 views

Cisco ME3400 IP-Based Bandwidth Limitation

The Cisco we use is: show version Cisco IOS Software, ME340x Software (ME340x-METROIPACCESSK9-M), Version 12.2(55)SE, RELEASE SOFTWARE (fc2) Technical Support: http://www.cisco.com/techsupport ...
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1answer
32 views

DHCP Server Port-Based Address Allocation on Cisco switch 2960-x

I am trying to configure DHCP Server on a Cisco 2960-X switch to achieve port-based address allocation. I would like the IP address assigned to any device connected to that port to be the same every ...
3
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1answer
2k views

Remote VPN - two-factor authentication with Cisco ASA + OpenLDAP

Can somebody give me a pathway (or link to the documentation / how to) to implement two-factor authentication (LDAP password + certificate) on Cisco ASA for RemoteVPN (with Anyconnect client)? ...
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5answers
34k views

ARP broadcast flooding network and high cpu usage

Hoping someone here might have some insight to the issue we are facing. Currently we have Cisco TAC looking at the case but they are struggling to find the root cause. Although the title mentions ARP ...
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1answer
4k views

cisco ip nat / port forwarding

I have been trying to get port forwarding working with a newly installed cisco router. I cannot seem to find where my fault is and have been looking for quite a while. The relevant section of my ...