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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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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56 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 ...
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73 views

Replace client switches with Netgear to match core or instead mix/match Cisco?

We are looking for how we can have a more reliable, simpler network. How can we keep out administrative burden low, and work smarter not harder when it comes to our infrastructure? Background: We ...
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78 views

Site to site vpn with one vpn endpoint behind NAT

I building an IOS <> Strongswan vpn between 2 host and following this exact guide: http://www.cisco.com/c/en/us/support/docs/ip/internet-key-exchange-ike/117258-config-l2l.html I use ikev1 since ...
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163 views

Stacking Cables on Cisco 3750G Switch

I stacked two 3750G Cisco switches a few weeks ago, all go. But, yesterday I installed a 2nd stacking cable as well for full optimization. However, it is not registering it seems. Cisco3750#sh switch ...
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73 views

Filtering even ip address from a router

Is there a way to filter out even(or odd) numbered IP address from passing through a router (I am working with the cisco packet tracer) using access lists or any other methods? Thank You
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46 views

Cisco SG220 Web Interface stops responding. Is there a way to reload it though the console?

I have a Cisco SG220 and the web interface stops responding and is no longer accessible after some days of usage. This is a fairly new equipment and every time it happens the switch continues to ...
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2answers
110 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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27 views

VPC router does not route traffic to CSR

I am trying to configure VPC Gateway Redundancy with Cisco Cloud Services Router (CSR). http://www.cisco.com/c/en/us/td/docs/solutions/Hybrid_Cloud/Intercloud/CSR/AWS/CSRAWS/CSRAWS_4.html ...
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2answers
80 views

cisco 5548 - version 5.2 equivalent command to “service unsupported-transceiver”

In my new cisco switch version, kickstart: version 5.2(1)N1(7) system: version 5.2(1)N1(7) In this latest IOS , it doesnt have service command. Could any one help , the equivalent command for ...
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72 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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46 views

Cisco ASA 5505 L2L vpn issue

this is my setup I already have a working L2L VPN between the sites I added the 10.10.0.0/24 to the object-groups that defines the internal network on the 1615 ASA And as a remote subnet on the ...
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93 views

How can I monitor pppoe session counts per subinterface on cisco router via snmp?

My BRAS router is a Cisco ASR 1004 and I am already using the command "show pppoe summary per subinterface" to monitor the online session counts. I am already using the oid ...
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27 views

RSTP over tunnel?

tl;dr: Is it possible to run RSTP over l2tp or MPLS? We have leased one gig capacity from a service provider's network, over which we sent a udp multicast traffic. The provider gives us drop at our ...
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59 views

Cisco IPv6 Proxy-arp like IPv4

Can I disable the proxy-arp in IPv6 in Cisco? I cannot find the "no ipv6 proxy-arp" command in my Cisco router. Please teach me how to do it. Thanks.
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1answer
97 views

Cisco ASA - Allowing external access to a secure server via RDP

I am new to the forums and really hope someone can help me. I am pulling my hair out! I have posted on both the Cisco forums and Windows forums in hopes anyone can suggest something but no one has ...
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28 views

Intercom for all phones on Cisco Unified Call Manager

In a Cisco based telephony (VoIP) system (CUCM 9.1.2.11900), I have successfully configured and used the intercom feature. It allows a user (typically a secretary) to push a button and automatically ...
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44 views

Use mail attribute for 802.1x RADIUS authenticatioon with Microsoft NPS

We have run a Cisco WiFi network that uses 802.1x to authentication logins against Active Directory. Employees login using their UPN prefix, and all works well. For various reasons we'd like users ...
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82 views

Pinging a host from a router through the selected interface

In a typical Cisco router it's possible to ping a host from the router's OS. When the ping packet leaves router (call it R1) through the fa0/0 interface, the source IP of that packet it set to the IP ...
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1answer
234 views

Sending IOS .bin file to Cisco 3750 Catalyst Using TeraTerm (xmodem)

I want to Update my Cisco 3750 Catalyst IOS. I don't have a LAN Connection with the Switch,just Console Cable, so I'm using xmodem and Tera Term to send the .bin file to switch. When I go to Tera ...
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68 views

Is it possible to increase the size of RAM of a CISCO UCS blade server?

We have a Cisco UCS Server which has 256GB RAM and installed with Win 2008 Server 64bit. I wanted to know can we upgrade its RAM to 512GB RAM? Is it possible to do that or do we need to build a new ...
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213 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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84 views

Putty blank when connected to Cisco Catalyst 3500

I'm using the normal blue RJ45 to DB9 cable plugged into my Cisco Catalyst 3500 series XL switch. That cable is connected to a serial-to-usb adapter that I got from Monoprice, and that is plugged into ...
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16 views

Cisco ASA5505 compatible RAM

I have a Cisco ASA5505 which I've acquired. It boots up first time successfully, and works without issue, however as soon as I reboot, it fails to boot with the flashing light sequence which indicates ...
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31 views

Cisco 1941 EIGRP UP DOWN

We have two cisco routers 1841 and 1941. The 1841 keeps generating "holding time expired" and "interface goodbye recieved" about its neighbor the 1941. The VPN IPSec protocol seems to stay up. ...
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26 views

ip dhcp excluded-address command no work

I want to provide 1.1.1.101 to 1.1.1.126 using dhcp pool. Here is my configuration no ip dhcp use vrf connected ip dhcp excluded-address 1.1.1.1 1.1.1.100 ip dhcp excluded-address 1.1.1.127 1.1.1.254 ...
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48 views

ICMP DDoS, proper ACL?

We are having about a 3-4Gbps ICMP flood on one of our servers and I wonder.. I have a 20gbps of DDoS protection but the proetction seems ineffective against ICMP funnily (it worked well to block a ...
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18 views

high ping6 latancy for cisco C3750

I have one cisco router with IOS software ( IOS Software, C3750 Software (C3750-IPSERVICESK9-M), Version 12.2(55)SE1). Recently, there is big ping latency, when I ping from one HP Gen6 SERVER which ...
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1answer
19 views

limited connectivity at end nodes

I am running a campus wide network of a University and experienced a very unusual scenario for my network. The problem is two folds and therefore i would like to explain that separately after briefly ...
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58 views

Real time Rssi from Clients from a Cisco WLC

I have a Cisco WLC and different LWAPPs. What I am looking for is a way to be able to get in the WLC the rssi of all connected clients. For the moment I am able to access through SNMP to the ...
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26 views

How Can I Have 1 Device Ignore Cisco Default Route?

I have a two building infrastructure that I need a few access point devices in Building 2 talk to the default gateway in Building 1. Each building has its own firewall. Each building is connected ...
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15 views

Long Response Times for Reads via FCoE

We're getting some intriguing performance with our new FCoE environment, and I was hoping that people could let me know if what we're seeing is expected behaviour. Our switching environment consists ...
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1answer
41 views

Cisco switch can't log off VTY user

I have a Cisco 3821 switch sitting on the edge that has 4 connections from China that can't be booted off. c3821:#sh users ... 12 vty 11 idle 1y40w ...
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609 views

Can a Cisco SG300 Layer 3 Switch act as a NAT router?

I have following Network Setup: Basic Home Wifi Router ------------------------------------------------ | Cisco 2500 Series Wireless ...
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18 views

Cisco 1921 ISR K9 with Cisco 2620xm failover

I have a Cisco 1921 ISR and a Cisco 2600 Router (2620xm). The C1921 is the primary router on the corporate network. I would like the Cisco 2600 to connect to a module on the C1921 and provide 2 ...
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33 views

Windows Domain Network, Cisco 1921 ISR, and NTP

In an effort to make sure all Windows application that rely on time work (such as RDP), and to make sure logging between computers and router are using the same times, I would like to use NTP ...
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98 views

VMware remote virtual serial port concentrator

I'm setting up a Cisco virtual wireless controller using the guide provided here: http://www.labminutes.com/wlc0001_vwlc_7_3_vmware_installation The narrator talks about making sure your VMware is ...
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2answers
271 views

Port-scanning on Cisco router with Nmap

I have Cisco 2911 router just booted with factory settings and no ACLs or NAT configured. All I did is turned on the interfaces and assigned IPs. I am trying to scan for open ports with Nmap, but the ...
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44 views

SNMP table for physical interfaces Cisco routers

For monitoring purposes, we are querying via SNMP the ifTable of our Cisco Catalyst routers. But virtual interfaces, like vlans are also returned, this list can become quite long, but even more, it ...
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116 views

Meraki Switch Uplink

Bare with me as I am not the greatest at networking and vlans but i can usually figure it out if i can find info. I have a new switch from Cisco Meraki (MS220-8P) and i am trying to configure a Dual ...
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42 views

How to access integrated switch module of a Cisco 3850 Router

I have a Cisco 3850 Switch with the 48-port switch addon module. Both the router and the switch have a IP address and telnet enabled, but telnet recently stopped working on the switch module. I can ...
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2answers
92 views

SSH'ing from a different subnet. The router does not seem to route correctly

An EDIT was made at the bottom I have a macbook on 192.168.12.x subnet, and a debian machine with apache2 server with ssh enabled sitting on 192.168.1.x subnet. The debian machine has a static IP ...
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1answer
308 views

Cisco BGP Unequal Cost Load Balancing

I'm trying to implement BGP Unequal Cost Load Balancing feature in my network. According to cisco manuals (long: http://www.cisco.com/c/en/us/td/docs/ios/12_2s/feature/guide/fsbgplb.html, short: ...
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42 views

Cisco 2960-X switch converting unicast video stream to multicast video stream

Can we convert unicast video stream to multicast video stream just using Cisco 2960-X switch ? Note: I tried to route incoming stream to 235.6.6.6 as it is my multicast ip adress, I used. In order ...
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17 views

Allow tcp traffic on certain ports from certain IP addresses with Cisco router

I have a Cisco 887 router where I want to allow tcp traffic from a set of external IP addresses to one of the servers on the inside. Further more I only want to allow traffic to certain ports. E.g. ...
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37 views

Cisco 2960G switch console username. Cannot login

I have a Cisco 2960G switch and I have configured a line console password on it. But I have not set a username and when I attach a cable to the console port I am asked for a username, but I cannot ...
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86 views

Is it possible to access inside server using outside address from dmz an a Cisco ASA

We have a Cisco ASA 5506-X (running ASA 9.5(1)) and a /28 public network. The first available address in the public network is assigned to the outside interface of the ASA and has NAT/PAT to several ...
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21 views

Cisco Unified Presence Server - Update Lync Status value for In a Call

The default value in Lync for a busy status is numerically represented as 6500. Is it possible to change the "In a call" status that the Cisco Unified Presence Server provides the Lync server.
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31 views

IP NAT from router to SSL-VPN appliance

Has anyone use Cisco 891-K9 to forward 443/SSL to a SSL VPN appliance? (I've never encountered this situation before because either the public facing router terminated VPN directly or we had multiple ...
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109 views

Tagged and Untagged Cisco vLAN port

I have a whole bunch of Dell switches I support and most of our users have a VOIP phone on vLAN 999 and a PC on a couple of vLANs. On the Dell switches I simply set the PC's vlan to untagged and then ...