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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Asterisk behind Cisco ASA 5505

I'm in the process of upgrading from an old WRT54GL running Tomato to a Cisco ASA 5505, versioning as follows: Cisco Adaptive Security Appliance Software Version 9.1(5)21 Device Manager Version ...
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1answer
17 views

IP Address secondary transpose

I am bit new to cisco and I have assigned 5 static IPs to my serial interface 0/0. I have NATed email in via one of the secondary IPs to the server. However, when I try to send mail out it's sending ...
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9 views

Issue Cisco PIM and multicast routing

I'm in the process or redesigning an IPTV headend that is running on mainly layer 2 (IGMP snooping) to layer 3 (Multicast routing using PIM Sparse mode), this will all be done mainly using cisco kit, ...
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1answer
29 views

How would I access a Cisco router for configuration/management over the public internet

I want to connect a cisco router (2950 series) to my normal broadband router supplied by my ISP. I want to test whether I can access the router over the public internet for configuration/management. I ...
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14 views

What is the meaning of off-ramp and on-ramp [on hold]

Title pretty well describes the question I can not find a proper definition for both the terms on-ramp off-ramp in networking world , cisco particularly Can someone please explain to me what they ...
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9 views

Vyatta Nat Rule Help Translating From Cisco ASA Rule

I'm fairly new to Vyatta and need advice on how to translate the following rule example from a Cisco ASA to the Vyatta. static (dmz2,outside) 192.168.254.0 192.168.254.0 netmask/24 How do I ...
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1answer
18 views

VMware systems not working on SRW2048 swtich

I received an old Linksys SRW2048 gigabit switch and have used a straight-through serial cable and the console port to reset the flash config back to defaults so that it is configurable for our ...
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16 views

Cisco ASA 5505 access external IP address from internal

Got a bit of a head scratcher. ASA Version: 8.3(1) ASDM Version: 6.3(1) So I have an ASA 5505 with 3 interfaces (Inside, outside and Hosting). The inside interface has the IP range of 10.0.0.X and ...
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1answer
34 views

Cisco IP Redirection (static NAT?) for non existant IP Range

We are moving office and our managed service provider has let us down badly. We have a Cisco 4500 stack with 5 VLANS configured of interest. These are: interface Vlan200 description FLOOR0 Gateway ...
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11 views

Error: Can't create new inside entry - forced_punt_flags: 0

I have a router Cisco 3725 and setup NAT on this but when I run command debug ip nat detailed it show error "Can't create new inside entry - forced_punt_flags: 0" My router config as follow: Current ...
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1answer
45 views

ASA Site-to-Site VPN Failure

We have a series of remote sites connecting to our main site using site-to-site VPN over Cisco 5505s. Every remote site works fine, except one. What is unique about the failing one is that its IP ...
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24 views

wpa_supplicant doesn't reach freeradius in 802.1x eap-tls wired

I want to setup a 802.1x EAP-TLS connexion with freeradius, wpa_supplicant and a Cisco Switch My network : supplicant eth0-----f1/1 SWITCH f1/0-----eth1 Freeradius the SWITCH is an emulated Switch ...
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11 views

Cisco 3900 Series router not booting

This started after trying to enter password recovery mode and rebooting. It rebooted the one time and started to load the ios but had some sort of TraceBack/Exception on the screen. I reset the power ...
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16 views

Cisco 1000BaseT SFP modules in a 3750 overheating

I have a 3750 responsible for switching in my DMZ. Every once in a while one of the gigabit links will go down although ios and the server attached to it report the link is up (activity lights, etc). ...
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11 views

Cisco ASA l2l tunnel established, can receive pings but cannot reply

I'm a bit new to managing a Cisco ASA appliance and I'm doing my best to learn, however I got a problem here. Long story short, we are trying to connect a hospital's ADT HL7 feed to our remote ...
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8 views

Cisco Split Tunnel AND Full Tunnel VPN configuration

I have split tunneling configured on my Cisco ASA 5505 security plus licensed firewall, and I want to know if I can have a split tunnel group and a separate group for full tunnel traffic? Can both be ...
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38 views

tcp previous segment not captured when NAT

I have a client request web service on a server behide NAT. My client IP is 10.54.10.193 NAT address: 10.54.28.183 Server address: 62.209.39.203 When client request web service on server we have TCP ...
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1answer
20 views

Cisco spanning tree commands

I have been immersing myself in the Cisco STP documentation, but for the life of me I am not able to find anything relating to the toppology changes (aka ports logically going down) when certain ...
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1answer
6 views

Cisco VSS failure.

We have two 6500s running with VSS. We have a switch with dual uplinks. Each uplink goes to a different 6500. If the VSL between the 6500s goes down then they both become active. This breaks the ...
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4answers
84 views

CISCO Home Lab Router not NATing [on hold]

I hope someone can help me. I have a AT&T 2wire gateway with a cisco router attached to port 3 of the AT&T 2 wire. I'm using the CISCO as a separate network and lab. Below is sketch of my ...
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1answer
39 views

Why is my DHCP pool not working?

I'm trying to create a configuration and it's doing most of what I want it to do, but the DHCP pool isn't assigning addresses. Here's the config so far: enable config t hostname xxxxxx enable ...
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7 views

view the maximum equal cost paths configured for OSPF

How do you check if the maximum number of equal cost paths has been modified (with the (config-router)# maximum-paths command)? Is the only way by viewing the running configuration? show ip ospf ...
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29 views

Want to Ping/access my Public Ip from Private IP, NAT firewall

One of my server is having private IP x.x.x.x and the Public IP for that server is 1.1.1.1 now when i try to Ping my Public IP from same server its not working, Firewall is NAT enabled. I want to ...
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1answer
16 views

How do I troubleshoot a VPN connection that won't forward DNS requests?

How do I troubleshoot a VPN connection that won't forward DNS requests? My network configuration without the VPN running works as desired. I have a Centos front-end NAT'ing outbound requests via ...
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1answer
10 views

Two network routing with CISCO 878

My company uses the 192.168.10.0/24 subnet and 192.168.10.235 is for all intents and purposes the gateway to the Internet. We have an extra VDSL line with a "home-style" modem/router that we want to ...
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1answer
18 views

Multiple public IPs routed via Cisco ASA to Proxmox VMs

I have a network with IP 199.221.2.136 (/29). I would like the Cisco ASA5505 [1] to work on .137 as router and use two public IPs (.138 and .139) on two VMs on a Proxmox server. Not sure how to route ...
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29 views

Unable to ping or RDP to servers via remote access VPN after DNS server change Cisco ASA

We have a setup here were users can remote into our network via VPN and then remote to their desktops. This was all working fine. The other day, we moved DNS from one server to another. I changed ...
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18 views

MacBook Pro Power over Ethernet support? [migrated]

I've got recently a Cisco IP telephone. I've an MBP (15", Late 2011): Is there any way to enable PoE to test my phone? Or do I have to buy an extra PoE injector just for this purpose? Thanks in ...
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18 views

Opennms - Physical interface update on Cisco Switches

I'm using opennms version 16.0.2-1 on ubuntu server 14.04 LTS. I'm configuring some cisco switches to send traps to openms. The traps are notified to events in opennms, if i put a physical ...
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1answer
16 views

Cisco arp inspection in 'log only' mode

Is there a ready way to enable Dynamic Arp Inspection (DAI) without having it in blocking mode to begin with? Failing that is there a good way to gather arp statistics from each interface over a ...
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1answer
27 views

D-link DAP-2695 VLAN configuration

Well... I thought I had this all figured out... I am essentially reopening this same question I had 2 years ago (Reference: D-link DAP-2590 VLAN configuration) I got it all figured out back then and ...
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2answers
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Cisco Catalyst 2960 Switches - Can I reverse the air flow?

I have some equipment that will be moved to a new datacenter soon. At the current datacenter, the switches are mounted in the back of the racks so the air flow for the switches is reverse in ...
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1answer
18 views

C891FW-E-K9 Memory upgrade

I have a C891FW-E-K9 ISR with ios c800-universalk9-mz.SPA.154-3.M-2. From what I can gather, the memory requirements for that image is 512MB but from "show version" my router seems to only have 384MB ...
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1answer
24 views

FusionPBX Failed(405) on Cisco 303 IP phone

Since yesterday, my phone started throwing a Failed(405) error when trying to register to a FusionPBX server. I have tried resetting to factory settings and reinstalling the FusionPBX server on ...
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12 views

Cisco 1941 HWIC Prohibitions

I recently upgraded our Cisco 1941/K9 router (see figure 4 here) to include an additional HWIC (HWIC-2FE) without issue. During my research for an applicable module to provision the necessary ports I ...
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10 views

cisco UCS UCSM xterm vt100 error when connecting to IOM, how do I change term type?

I know this is no big issue but it just annoys me. I have UCM pair, when connected to A I can connect through to local IOMs with no issue but when connected to UCM-B if I jump to one it's IOMs I get ...
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59 views

Cisco 3120 blade switch does not boot after power outage

We use a Cisco WS-CBS3120G-S in a HP BladeCenter. After a power outage, the switch will not boot anymore. The switch dose not output anything on serial console. The LEDs SYST, STCK and active (under ...
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2answers
20 views

Eigrp topology table

This is a cisco networking question does Eigrp topology table contains the entire network topology on it's database! I am a bit confused in this, can someone let me know! thank you
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1answer
28 views

PPTP + LAN = Maybe?

This has been someone answered in another question but the question was never answered. I've successfully set up a PPTP server at my work, and while I understand the whole point of PPTP is ...
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0answers
17 views

Trouble setting up MACBook to Cisco RV042 VPN

I am trying to create a VPN connection from a MacBook Pro running OS X 10.9.5 to a Cisco RV 042 Firewall/Router. Using the MacBook Pro built in VPN client software. I have exported the client ...
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28 views

Load Balancer Loop Through

I have a Cisco ASA which is currently load balancing a number of web applications. We are preparing to bring a new application online that is an API that is going to be referenced by one or more of ...
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1answer
15 views

MCU packet capture

I am trying to do a packet capture of a video conference hosted with CISCO [Codian] MCU. The instructions for capturing SIP packets with Wireshark are available. I also configured MCU to accept SIP ...
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1answer
90 views

Cisco ASA 5550 rebooted itself, logs cleared

we had Cisco ASA5550 in Active/standby mode which worked without any issue for over 1 year. Recently, we started having issue where the VPN tunnels would drop to sites and have internet outages. We ...
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1answer
47 views

Why would a network resolve some sites and not resolve other sites?

Win 8.1, IE 11 I recently made some changes to my internal network and suddenly attempts to access Bing are giving an error. My network is: When I connect either wired or wireless to the wireless ...
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1answer
33 views

configuring cisco switch sg-300 20 can't change vlan name

I have this very strange issue. Not a biggy because I can do it using the GUI but it still drive me nuts. Just out of curiosity whether anyone has been through this and know the answer to it. It's ...
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1answer
36 views

vlan tagging between l3 and l2 switches

I have three layer 2 swtiches, and 2 layer 3 switches. g40 on layer 3 switch (which is used to talk to a Layer2 dell switch). Is currently set up as an access port. I have a series of access points ...
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40 views

IOS FlexVPN client keeping create child SA every 60s?

I got a flexvpn client with sVTI tunnel interface, but it keeps creating child sa every 60s, like below. The VPN server is a linux Strongswan box, the config works fine in IOS 15.3 but not 15.4+. Any ...
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1answer
42 views

Dynamic NAT configuration

I am using two routers and one host (computer), I connected fast Ethernet 0/1 of router A with the host and fa0/0 of the router A with the router B I have configured gateway as last resort on both ...
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28 views

VLAN Mapping on Brocade

We are moving from a Cisco 6509 to a Brocade 6650 for our core router. Some of our traffic is trunked through a link that belongs to someone else and they said we can only use VLANs 909-912. Our ...
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177 views

ASA 5505: How do I access the DMZ web server from the inside using the public IP?

We are using a 5505 ASA Sec+ (8.2). There are three interfaces: inside (172.17.0.0/24), dmz (172.16.0.0/24) and outside (1.2.3.4 for the example). There are static NAT rules set up translating ...