LAN, Switching and Routing

The Cisco LAN, Routing and Switching Technical Support Forum gives you access to participate in tech discussions and go through documents on Cisco LAN Switch, LAN Router, VLAN, Cisco Catalyst, Catalyst 6500, Catalyst 3550, Jabber Client, Nexus 7000, and other related issues. You can browse through latest tech topics popular among the community.

 

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Vlan questions... I'm still having a little trouble figuring out how they work. I have a 3750. I added a new vlan 11 with ip 10.10.11.1. it already...
1 min 56 sec ago
I have a network with 2 3550PoE  switches and a 3524XL switch.  The networks perfectly and phones connected to the 3550PoE switches get their IP ad...
22 min 40 sec ago
Is it possible to upgrade Nexus 5548 and 5596 switches from 5.2 to 7.1, without interruption to the downstream devices? We have numerous pairs of N...
2 hours 52 min ago
Hello CISCO networkers, I'm currently troubleshooting a couple CAT 4500-E series with the supervisor SUP6L-E that seems to fall under this bug cond...
3 hours 12 min ago
Hi,    If I am trying to configure VSAN load-balancing for an FCOE trunk. Besides, configuring the load-balance method under the VSAN database do I...
6 hours 39 min ago
         
IP SLA 325 3 0 0 0
Routers 2 0 0 0 0
Switches 6739 569 6 1 0
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Subject Views Votes Rating Replies Last replied by
discussion vlan confusion
Last Reply 1 min 56 sec ago.
0 0 0.0 0 Jessica Bright
discussion 3524XL canot ping from CLI nd IP phones do not DHCP address
Last Reply 22 min 40 sec ago.
0 0 0.0 0 Michael Durham
discussion NEW THREAD: 10G SFP+ Auto-Negotiating to 1G?
Last Reply 44 min 51 sec ago.
47 0 5 3 visitor68
discussion Etherchannel Simultaneous Primary and Sub-Interface Config
Last Reply 1 hour 15 min ago.
0 0 0.0 6 Jon Marshall
discussion Issue configuring Nexus 6001 for NLB
Last Reply 2 hours 49 min ago.
71 1 5 7 Mike Saldivar
discussion Nexus 55xx NX-OS upgrades without interruption
Last Reply 2 hours 52 min ago.
0 0 0.0 0 Brian Meston
discussion DHCP Snooping Issue
Last Reply 3 hours 2 min ago.
59 0 5 12 amikat
discussion Cisco Bug: CSCtf85481 - Sup6L-E reloads silently
Last Reply 3 hours 12 min ago.
0 0 0.0 0 m.teixeira
discussion voice qos
Last Reply 3 hours 19 min ago.
6 0 0.0 1 Anukalp S
discussion Strange Connectivity Issue
Last Reply 3 hours 20 min ago.
0 0 0.0 9 dcanady55
discussion route-map and or logical algorithm
Last Reply 3 hours 25 min ago.
3777 0 5 13 Ahmad Nishad Mo...
discussion Mixed version/Switch stack 3750x and 3750g
Last Reply 3 hours 58 min ago.
0 0 5 4 favyan asia
discussion NTP Design Questions
Last Reply 4 hours 21 sec ago.
34 0 5 8 grochowskir
discussion Where can I get the Cisco Generic Visio Icons in Color (Cisco blue)?
Last Reply 4 hours 52 min ago.
12310 0 5 3 Peter Long
discussion Can you broadcast the same default gateway on two cisco HSRP linked routers
Last Reply 4 hours 54 min ago.
0 0 5 2 Colin Craig
discussion N5K : a way to log CLI commands issued by users ?
Last Reply 6 hours 25 min ago.
14 0 5 3 guillerm
discussion High convergence time rstp
Last Reply 6 hours 35 min ago.
68 0 0.0 16 Jon Marshall
discussion Setup VSAN load-balancing for FCOE trunk link
Last Reply 6 hours 39 min ago.
2 0 0.0 0 Victor Reyes II
discussion Port security mac address max # and VOIP (for umpteenth time)
Last Reply 7 hours 4 min ago.
3825 0 5 3 mahesh parmar
discussion sntp configuration in SF500 seems not working
Last Reply 7 hours 11 min ago.
16 0 0.0 1 joopv
discussion MLS QoS configuration
Last Reply 7 hours 25 min ago.
0 0 0.0 1 Joseph W. Doherty
discussion IOS XE and aaa
Last Reply 7 hours 43 min ago.
1 0 0.0 1 thiland
discussion LACP Link faster in one direction
Last Reply 10 hours 1 min ago.
31 0 0.0 4 toprock1970
discussion I want to perform BASIC QoS on a few ip access-lists, is this enough?
Last Reply 11 hours 30 min ago.
26 0 0.0 4 Joseph W. Doherty
discussion Catalyst 4500x-32
Last Reply 12 hours 12 min ago.
19 0 0.0 4 Joseph W. Doherty
Filter Results
Subject Views Rating Comments Author
Single-sided vs double-sided vpc
Last Reply 4 hours 33 min ago.
8525
3.7
7 pnagpal
EEM Script for collecting data during Intermittent High CPU issue
Last Reply 2 years 5 months ago.
6775
0.0
3 pnagpal
Troubleshooting Nexus 7000 - Useful commands
Last Reply 3 years 2 months ago.
3640
0.0
3 pnagpal
Cheat-sheet for Catalyst 6500 with Sup 720
Last Reply 3 years 4 months ago.
6983
0.0
2 pnagpal
Deep dive into EIGRP Summarization
Last Reply 3 years 7 months ago.
15
0.0
0 pnagpal
Routing Protocol Selection Guide - IGRP, EIGRP, OSPF, IS-IS, BGP
Last Reply 1 year 4 weeks ago.
92897
4.0
1 Shaun Hummel
CAM (Content Addressable Memory) VS TCAM (Ternary Content Addressable Memory)
Last Reply 1 week 2 days ago.
53660
4.5
5 Thamaraiselvam Santhanam
Understanding MSFC, PFC and DFC roles in Catalyst 6500 Series Switch
Last Reply 5 days 9 hours ago.
39951
5.0
12 SunilKhanna
Redundant-power-supply support on the Cisco Catalyst Express 500 Series switches
Last Reply 5 years 8 months ago.
392
0.0
0 TCC_2
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 3 weeks 3 days ago.
96179
4.7
47 ashirkar
example of Embedded Event Manager (EEM) on my 881W - to shut down a interface at 1am
Last Reply 3 weeks 4 days ago.
190
4.0
2 dshornstein
OSPF and IS-IS Differences
Last Reply 3 weeks 4 days ago.
3829
5.0
1 inderdeeps
Switch Fabric- Troubleshooting tips
Last Reply 3 years 3 months ago.
18319
5.0
2 pnagpal
The "%SW_DAI-4-DHCP_SNOOPING_DENY:" error message is received when configuring the dynamic ARP inspection in switches that run Cisco IOS Software
Last Reply 1 month 4 days ago.
21851
5.0
4 TCC_2
Troubleshooting tips for 3750X Stack power feature
Last Reply 1 month 1 week ago.
13081
4.0
5 pnagpal
ITD: Load Balancing, Traffic Steering & Clustering using Cisco switches
Last Reply 1 month 1 week ago.
55
5.0
0 expertadvisor20151
Configuring Microsoft NLB on Nexus 7000
Last Reply 1 month 1 week ago.
5108
5.0
2 mrabbi
OSPF Design Best Practices
Last Reply 1 month 1 week ago.
34810
0.0
2 pnagpal
Importance of BPDU Guard and BPDU Filter !!
Last Reply 1 month 1 week ago.
78858
4.7
11 ganeshh.iyer
The VLAN goes to the administratively down state if two or more VLANs are configured
Last Reply 1 month 1 week ago.
27246
3.7
3 TCC_2
Nexus - vPC Recommendations
Last Reply 1 month 2 weeks ago.
17425
5.0
2 pnagpal
Known Issues on Cisco 7600 Router ES+ Line Cards
Last Reply 1 month 3 weeks ago.
12454
5.0
6 Aleksandar Vidakovic
Filter Results
Subject Views Rating Comments Author
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
Last Reply 1 month 1 week ago.
21483
4.6
12 jakula
blog License Activation on 4500
Last Reply 4 months 2 weeks ago.
150
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 4 months 3 weeks ago.
7001
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 7 months 3 weeks ago.
2105
5.0
5 aninchat
blog Booting Cisco Router from a TFTP server
Last Reply 7 months 3 weeks ago.
14475
5.0
3 ajaju
blog Loading an IOS on a switch via Xmodem
Last Reply 8 months 1 week ago.
36884
5.0
7 aninchat
blog Configuring a frame-relay switch
Last Reply 9 months 2 weeks ago.
5802
5.0
7 aninchat
blog Upcoming Ask the Expert Event Featuring Ahmad Manzoor - Senior Pre-Sales Engineer at AGCN
Last Reply 9 months 3 weeks ago.
369
5.0
0 Francine Richards
blog Upcoming Ask the Expert Event with Cisco Designated VIP Marwan Al-shawi May 12-23
Last Reply 9 months 4 weeks ago.
121
0.0
0 Francine Richards
blog Cisco WCCP with Bluecoat (Multicast mode)
Last Reply 10 months 1 week ago.
97
0.0
0 vishal_2007
blog OSPF over IPsec Tunnel stucks in INIT state
Last Reply 10 months 2 weeks ago.
298
5.0
0 hsticher
blog Pre-build SPT feature on Nexus - Benefits & Caveats
Last Reply 2 years 9 months ago.
1007
5.0
0 srereddy
blog Link de-bounce timer operation when used on SFP+ ports on Nexus switches
Last Reply 2 years 9 months ago.
709
5.0
2 srereddy
blog Flexlink in Cisco Layer 2 network
Last Reply 2 years 1 month ago.
77
5.0
0 jakula
blog Output drops due to QoS on 2960/3560/3750 switches
Last Reply 3 years 10 months ago.
20625
5.0
0 shashasi
blog Community Tech-Talk Series: Troubleshooting High CPU due to Multicast
Last Reply 1 year 9 months ago.
7893
5.0
9 rucjain
blog Chalk Talk: The Secret to Successful QoS Deployments: A Well-Defined End-to-End QoS Strate
Last Reply 11 months 2 weeks ago.
271
0.0
0 Julie Burruss
blog Switch: How to test a cable status?
Last Reply 11 months 2 weeks ago.
4690
5.0
3 Anand G
blog Difference between N7K-M132XP -12 and N7K-M132XP -12L
Last Reply 1 year 2 months ago.
1401
0.0
1 ramugaju
blog About "TestErrorCounterMonitor" in 6500/7600
Last Reply 1 year 6 months ago.
1754
4.7
1 Anand G
blog Parity Error.
Last Reply 1 year 7 months ago.
2256
4.5
4 InayathUlla Sharieff
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