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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64 views

How to find out from which switch is coming the exact MAC address

I am working on a big company with 2 Backbone routers (ARS9K) and 200+ switches (Cisco, D-link, Tp-Link and etc.). Lets say that I know an exact MAC address of a device, but I do not know to which of ...
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21 views

How to connect internal IPv6 to IPv4 network

For the past few days Im having "fun" checking different NAT configuration options on srx240. Im looking for a way to enable lab PC connection to internet. Is it possible with this spec, or do I have ...
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83 views

Unknown root user on Cisco 1921 router

Just a moment ago I ran the who command on my router and I noticed myself logged in on vty 1 but another user root was on vty 0. The Location under that user is some location I do not know (someone ...
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1answer
322 views

Possible Cisco Router Hack?

We have a Cisco EPC3928AD EuroDocsis 3.0 2-PORT Voice Gateway from our ISP. The router is connected to a firewall (an Ubuntu-box running iptables and Wireshark). Our LAN (10.0.0.1/24) is beyond the ...
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6 views

Cisco IPSec OSX multiple user accounts

Is it possible to force a Cisco IPSec Connection to prompt for UN/PW before login on OSX 10.10? I want to store the VPN Connection on the OSX machine, but I want users of that device to enter their ...
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30 views

Cisco ASA Static NAT RULE Problem

I need to clarify a one of cisco asa NAT rule. i searched lot and still not found a clear answer. please see below rule • nat (Inside,Outside) source static any any destination static ...
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212 views

CISCO port tracing by LED light blinking

I work as IT technician,part of my job I have to trace the UTP cable to the switch port, I used for the a program called WinCDP by connecting to my laptop Ethernet port and it will tell me where is ...
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69 views

How can I use openscap to do an offline OVAL scan of a Cisco router?

This doc describes a process of scanning a router's "show tech" file with a joval utility. I downloaded joval's trial, but didn't see that utility. Can openscap do offline OVAL scans of Cisco ...
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1answer
104 views

Adding 4th scope to DHCP and make a superscope in windows 2012

Hope someone can shed some light here. I have a little network drama which I'm trying to get resolve as soon as possible. To give you a little background; We have CISCO SG300 small business switches ...
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2answers
536 views

VMware - VM not getting DHCP address after reboot

We are having a strange behaviour in our ESX-cluster: The Infrastructure: we have 2 ESXi 5.5.0 build 2718055 in a cluster, managed by vCenter. We are using an Essentials licence, so we do not have ...
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1answer
414 views

SSL/TLS Cert for Client VPN - Meraki

Hoping you can help me out here. I am attempting to setup a client VPN through our Cisco Meraki MX80 security appliance/router. I plan to use the Active Directory Authentication option so that users ...
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25 views

Something like WSUS but for Cisco routers?

A Windows Update Server will automatically download Windows updates/patches to a central repository and then the admin can pick and choose which patches to push out to Windows servers. Is there a ...
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1answer
64 views

Unable to connect to the internet with cisco 2911 using computer

It appears to be a NAT issue but I'm completely at a loss as to why this is not connecting. Cisco g0/0 192.168.42.5/24 <-> Wireless WAN: 192.168.42.1/24 Cisco g0/0 - shutdown Cisco g0/2 ...
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1answer
212 views

How to change broadcast-flag in Windows or Linux?

As we know there are 4 types of packets involved when a client wants to get an IPv4 address from DHCP Server. These can be seen in the image bellow (from Microsoft web site). From the perspective of ...
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2answers
98 views

Best practice for using multiple links between switches when link aggregation is not supported?

I have a half-dozen servers and workstations in an office. The systems are connected to a Cisco SG200 gigabit switch in the room. The room has two gigabit wall-port ethernet outlets. I have the switch ...
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0answers
75 views

Connecting 2 single switches to a stack

I have a core switch made with 2 stacked Cisco SG500XG-8F8T switches. Now I have to connect 2 3Com Baseline Switch 2920-SFP Plus to extend my gigabit network, but they are not stacked. So I connected ...
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15 views

About to buy Cisco ASA 5506-X [duplicate]

I'm about to buy my first Cisco router and intend to buy the Cisco ASA 5506-X. From reptuation, I've rightly or wrongly, got the impression that Cisco love to bolt on subscriptions for things. When ...
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20 views

Can't change Cisco ASA Easy VPN Server Address - no changes were made

I am trying to update an Easy VPN Server address (it is changing) via ASDM, however when I enter the new address and click Apply it says No changes were made. Any ideas how I can change this please? ...
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2answers
66 views

Routing/gateway problems in a simple topology

In order to have a second "backup" gateway for my company network, I tried to implement this topology: It is pretty straightforward, with the network between the modem and the router being the ...
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2answers
106 views

Static IP settings wrong? Why?

I have this issue when I try to copy files over my network (from PC to NAS). The first file seems to copy without a problem until it reaches 99%. It hangs for minutes and fails eventually. Let me ...
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1answer
133 views

Can I set up a VoIP phone to connect to it's gateway over VPN with different subnets?

A little background first: Currently, we have a main office and a remote office. They are connected via site-to-site VPN. Main office uses a Cisco router with DHCP at 10.10.10.0/24 while the remote ...
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203 views

Captive portal setup with minimal hardware requirements

I am willing to deploy a captive portal for a free wifi access at my local business. I would like that every customer connecting to my AP be redirected to a web page where I could display some ad for ...
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136 views

Pinging across VPN tunnel

I have built a VPN tunnel between an Azure virtual network and Cisco 881 router. I have a virtual machine sitting on the Azure virtual network, but the router isn't able to ping the virtual machine. ...
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126 views

VPN cisco any connect on linux

I installed on my Linux red-hat machine the VPN any connect version 3.1.03103 when I am trying to connect the customer IP - 192.7.8.67 VIA port 8080 I get the following error: what is actually I ...
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2answers
33 views

How do I know if a specific cisco router and IOS support a certain feature?

The reason I'm asking is I'm trying to set up a Cisco Catalyst 2800 series router as an 802.1x supplicant. According to this document, ...
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64 views

The proper way to create a VPN tunnel with one static host and one dynamic host

Note: I have never attempted this before trying today but I knew it was possible due to research online. So I gave it a try and got it to work... I have one static host (let's call it HOST_S) which ...
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1answer
126 views

Cisco switchport is solid amber

I have a port on my switch that is showing a solid amber light. I have tried to shutdown this port, but it still shows the solid amber. This switch is production critical so, I cannot reboot it ...
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1answer
68 views

Can I add delay on gigabitEthernet type of interface (cisco switch)?

I learned that I could introduce delay on serial interface by using the command delay 'yyyyy' Can I also do this if I am using gigabitEthernet interface?
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44 views

drop ingress packets cisco router 2921

I am new here. I really hope you can help me solve this problem. I am testing the BFD feature of my deviceA, and I do not want to use a link simulator in doing so. I was able to drop packet in egress ...
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1answer
101 views

What does this Cisco Router firewall configuration mean?

I have a Cisco 881w that I have attempted to set up a very basic firewall on, but I am not convinced I have done this correctly. Below is the configuration pertaining to the firewall and access lists ...
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1answer
42 views

Cisco ASA access-lists redundant entries

I need to modify existing configuration of the CISCO ASA. While analyzing the configuration I noticed something that looks redundant to me. I would like to see if somebody can confirm my doubts. ...
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2answers
277 views

Problems with installing Cisco ASDM on a Windows Server 2008 R2

I try to get this as short as possible. My company has a computer with the Cisco ASDM-IDM Launcher on it with which we access our Firewall (Type ASA 5505). Now we want to install the ASDM on our ...
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96 views

cisco 1800 series NAT with secondary IP

I have some troubles doing NAT. If I set up NAT for a particular port, the server replies, but it does so from a different IP address, (specifically from the main IP). If I set up NAT to B.B.B.B, the ...
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84 views

Getting a VLAN IP address

is there anyway to get a static IP address from a VLAN port on a CISCO switch ?. what I'm looking for is a software weather it's a Linux or windows software when I plug Ethernet cable from my laptop ...
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1answer
38 views

Notation used in Router configuration diagrams

I was listening to an MPLS tutorial on youtube.MPLS tutorial I came across this diagram. I am not that familiar with router configuration.My questions are as follows. 1) what does G1/0, G2/0, G3/0 ...
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345 views

Weak and ephemeral Diffie-Hellman key on CISCO PRIME

Can't login on Cisco Prime web interface due to this error on chrome. How to solve?
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31 views

Cisco Nexus 1000v %IPQOSMGR-4-QOSMGR_WARNING_MSG

I have a Nexus 1000v installation running for well over a year now without any problems. Recently I noticed that I keep getting a warning every few minutes on CLI. 2015 Sep 7 15:13:53 n1kv ...
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239 views

Cisco ASA 302014 syslog explaination

Can someone please explain the format of cisco asa syslog 302014 and more specifically the difference between idfw_user and AAA user? The message format is shown below: Error Message %ASA-6-302014: ...
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1answer
195 views

Is it possible to set up WAN connection on a VLAN (Cisco Router)?

I'm trying to set up NAT load balancing (or failover) with two ISPs on my 1941 router. The router has only two WAN ports and 4 EHWIC ports (which are basically switch ports). One of the WAN ports is ...
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1answer
595 views

How to choose VDSL firmware on a Cisco 887VA router?

On Cisco ADSL routers, there is a wide choice of modem firmware releases available, as well as IOS releases; each IOS release comes with its built-in modem firmware, but you can override it with a ...
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1answer
147 views

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
38 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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50 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
41 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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24 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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34 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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92 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
53 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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91 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
126 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 ...