Switching

Cabling Question

I have a question regarding cabling. What would the symptoms be if I were experiencing interference in my cabling? We are having some issues with some devices in our manufacturing area. I see no errors on the switch port, yet there is intermittent co...

Resolved! Nexus Ping loss

We have two Nexus 7k used as core in a site, they are doing VPC and have portchannel between . The ping from one to other loses constantly with 0.5% percent. and I did ping from one of them to the switches that directly connect to them. the ping is a...

Cisco ISR 2911, 2921 management port

Hello everybody.I can not find any information about management port of Cisco ISR 2911, 2921 and so on.There is management port in specification of 2911 and 2921 and I do not know if this port can be as a simple Ethernet port – forward traffic in/out...

Resolved! Catalyst 3750 - Logging - syslog

Hi there.I'm looking to configure a syslog server for all of my cisco device logging. I've had a look at CNA and can't find any options to define a syslog server for my switches.What's the best way to define a syslog server and the severity of the no...

Resolved! OSPF default

hi,i have a trinagle network B and C are connected to A ,a has static default route to isp,while ospf is configured on all three ,b and c does not generate acandidate default routein theirrouting table.Here all links are 34 mb,i.e. A 34 /...

Cisco 2800 Router Physical and sub interface

Hello All,I have a pair of router Cisco 2800 running in HSRP, now I want to configure one sub interface with another subnet, Will my current IP on physical interface work or do I need to create two Sub interfaces for each network. Do i must need enca...

CatOS 2948G Serial Number - show version/sprom and sticker don't match!

I am trying to find the serial number on the CLI that matches the serial number sticker on the back of a WS-C2948G-GE-TX switch that runs CatOS. I am running code cat4000-k9.8-3-2-GLX.bin. I have 4 different switches and all the stickers have a ser...

WAN ethernet queueing

Hello,We have an ethernet backbone/backhaul with Cisco (mostly 2960). Our links providers operate fiber SDH network and they give us the links with 100/1000 Ethernet interfaces.This creates a problem because while the interfaces are 100/1000 the link...

Resolved! inter-vlan routing/switching

VLAN questions. I have a fast ethernet with vlans 1, 10, 20, and 30 configured on four sub intervaces. Each switch has an IP within VLAN 1. Everything was reachable via ping. Then, I placed 12 interfaces on one swith into VLAN 10, and lost connectivi...

CISCO 1811/k9 DDR memory test failed.

Hi Guys,Recently i atsrt having problems with my cisco router 1811/k9, apparently was booting continiosly when restarted.After i connected my console i found the problem while booting:DDR memory test failed. Resetting the router ...I tried to contac...

2960S-24TS-L - lanbase-routing

Having troubles with all of my 2960S's with lanbase-routing enabled and 0 routed interfaces showing up in the template. I only have one SVI configured and that is the managment SVI 5 The current template is "lanbase-routing" template. The selected te...

Cisco 3750X and uRPF support

I have read some cisco documentation that suggests that the Cisco 3750X platform supports uRPF. But, the documentation seems to only be concerned with using uRPF with VRFs, not just on an interface.So my questions:1. Can you implement uRPF on a 3750X...

Cisco 3750x Stack - LACP waiting to be aggregated takes too long

Hello,I have configured a portchannel with 3 ports - lacp active modeI want to pxe boot esx server with Hp Proliant DL 360 G7.During Pxe Boot the physical Interfaces must be in (I) state - standalone.The server receives via dhcp the ip but after gett...

Root bridge explanation

I am just trying to understand what is going on here... In attachment you find a simple scenario... The vlans 5 to 10 are the DMZ Vlans which are the sub-interfaces in ASA Firewall. The point that I don't understand is that why for all these Vlans, s...