Questions tagged [cisco]
The major provider of networking equipment. This is a generic tag to be used when no more specific tags are available. See the list of tags in Help Center Tag page.
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TCP Client / Server in Cisco EEM 3.0
I'm attempting to set up client / server sockets in Cisco EEM 3.0 TCL with IOS version 12.4(24)T8 (this was recently upgraded to determine whether the problem was EEM ver).
I have the following two ...
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Is Nexus 7000 series line card "OIR" impact-free?
I have read many data sheets on the Nexus 7000 series and it's cards purporting to be capable of OIR (Online Insertion and Removal).
However I have never needed to replace/reseat/add any Nexus line ...
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Sending Cisco NCS/Prime Infrastructure reports without encapsulating them in a zip
Is it possible to configure Cisco NCS/Prime Infrastructure to send reports via email without encapsulating them in a zip?
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Cisco GET VPN Configuration - Best Practices/Can the loopback be used?
I am in the process of re-ip addressing a large number of remote locations, all of which are using a Cisco GET VPN/GDOI configuration for encryption of the traffic. In the process, I also wanted to ...
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I'm setting up a Cisco CCNA lab, what equipment would you recommend?
Is it okay to use a Cisco 2948 for CCNA students, after all it's cheaper to get these switches and they have more features? Wouldn't this be better than a 2950 switch?
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Mitigating bad/malicious IPv6 RA announcements
In a Cisco environment (ISR-G2), how do I prevent, or mitigate, incorrect RA announcements?
I see Cisco has "IPv6 RA Guard"... But does that just run on the router and "fight back" with correct RAs? ...
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Can I run FCoE over Cisco Catalyst 5500?
I have 2 spare older Cisco Catalyst (not Nexus) 5500 switches. Would I need any additional hardware in order to run Fibre Channel over Ethernet (FCoE) over them? Do I need some kind of management ...
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What is the proper way to config a Site to Site IPSEC VPN and a Remote Access VLAN on the same external interface? Cisco 891 ISR
I'd be happy to post the config or logs for reference but I am having trouble getting my remote access VPN working on the same interface as my site to site IPSEC VPN. I am using a dynamic crypto map ...
- 291
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What are the alternatives to OTV for stretching a layer 2 network across 2 datacenters?
We want to find a "safe" way to stretch layer 2 network across 2 data-centers, and since we don't have any equipment running NX-OS on either data-centers we can't use OTV.
So what are the alternatives ...
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Routing with seperate WAN link for backups
We have two geographically separate data centers. We are preparing to implement a new WAN connection (dark cloud) that would be used only for backup traffic. The servers will have two NIC cards (...
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What causes total output drops on a cisco switch interface?
I have an HP c7000 blade chassis which contains Cisco 3120X and Cisco 3120G switches running ios 12.2(58)SE1. The blades themselves are very lightly loaded yet many interfaces on different blade ...
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In a multi-tenant environment what should be done to make your switchports silent on Cisco and Juniper switches?
For example preventing it from sending arp, stp, etc and to reveal as little as possible about the rest of the network.
Example use case would be connecting to a peering exchange.
- 1,675
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Why does this router fail to use multiple, equal-cost routes from OSPF?
A Brocade router running NetIron 5.2, and a Dynamips emulation running IOS 12.4 both fail to dependably use equal cost paths in what seems to be a very simple configuration. I say "dependably" because ...
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Protocols: EIGRP vs OSPF [closed]
EIGRP and OSPF are both IGP protocols, the former is a mostly Cisco protocol and the latter is a well established open standard. What are the benefits of one over the other?
Put another way, when ...
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Mac-flap due to roaming clients on wireless
We are running an Aerohove wireless network (controller-less).. I occasionally get mac-flaps within the VLAN tied to a SSID. I know this is coming from a roaming client.. The problem is that the ...
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Wireless Probe Request Forwarding Best Practices?
I'm working with a couple Cisco WLCs and I know that they use information about client signal strength in determining device locations but I was reading up on "probe requests" and found that, by ...
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Nexus 2000 pinning best practice
As many known the Nexus 2000 series is a switch which allows a distributed fabric in DC networks. Pinning Nexus 2000 is quite a breeze. I was looking to seek discussion and a general consensus on what ...
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Cisco ASA site-to-site VPN failover
We recently replaced international MPLS with new ASA 5510s and site-to-site VPNs. However, when we deployed this we ran into a problem where each remote location has 2 ISPs for redundancy, but when ...
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What is Dec MOP and how to disable it?
Performing a packet capture I keep seeing strange "DEC MOP Remote Console" frames:
No. Time Source Destination Protocol Info
141 83.557841 Cisco_57:62:a0 ...
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How can I force VTP clients to update their VLAN database from the VTP server, on Cisco devices?
I was doing some cisco exercises on configuring a vtp server and client, something I can't figure out is :
I setup a vtp server, added my VLAN's
I then took another switch that was attached to this ...
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