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.

 

Provide answers to questions in this community that are awaiting a correct answer.

Greetings, One of our 4510 switches that had a single active power supply went down early in the morning.  There is no crashfile on this.  I am tr...
22 min 51 sec ago
Hello Guys, I have a Cisco 6503, there are 16 ports on module 3 and they've been set as trunk ports for Layer 2 switches' uplinks for quite long t...
25 min 5 sec ago
Hi supportforums, I have a cisco 887 configured with trusted VLAN11 and untrusted VLAN33. Wired and wireless clients in VLAN11 get routed via the...
6 hours 37 min ago
Hello,  I have a small LAN, based on SG300-52MP 52-Port L3 switch. On this switch I have 3 VLAN (10, 20, 100) and TWO aDSL routers. At current conf...
10 hours 29 min ago
Hi, I have two C9332PQ switches with initial configuration and we need config the breakout mode at some interfaces. When we write the interface br...
10 hours 39 min ago
         
IP SLA 325 3 0 0 0
Routers 2 0 0 0 0
Switches 6726 569 6 1 0
Filter Results
Subject Views Votes Rating Replies Last replied by
discussion IOS update error
Last Reply 11 min 21 sec ago.
28 0 0 8 domingoe1
discussion Trunk Port Security & Native VLAN
Last Reply 52 min 22 sec ago.
68 0 0 9 amikat
discussion STP Loopback error and Keepalive : ETHCNTR-3-LOOP_BACK_DETECTED
Last Reply 1 hour 34 min ago.
57 0 0 10 Philip D'Ath
discussion Link state monitoring in Cisco switches
Last Reply 2 hours 20 min ago.
29 0 0 4 pille1234
discussion Most stable software image for WS-C3560X-24T-S?
Last Reply 2 hours 29 min ago.
1 0 0 1 Joseph W. Doherty
discussion Nexus 7010 NTP Clock lacking
Last Reply 2 hours 38 min ago.
13 0 5 4 verma_amit1
discussion problem with HSRP Multiple.
Last Reply 3 hours 15 min ago.
14 0 0 4 paul driver
discussion Network Assistant With 2960X
Last Reply 3 hours 20 min ago.
853 1 0 4 Darinth.Malacoy
discussion Cisco 3850x Very High CPU - Stack-mgr Process
Last Reply 3 hours 35 min ago.
2718 5 0 21 d.lachapelle
discussion Cisco WS-C3560X-24 switch gets overloaded and reboots on its own
Last Reply 3 hours 39 min ago.
0 0 0 0 Bret Bruning
discussion Cannot ping hosts from 3650 management interface
Last Reply 3 hours 49 min ago.
2 0 0 4 testrite1
discussion Process hl3mm
Last Reply 3 hours 51 min ago.
0 0 0 0 tonyp8581
discussion l2protocol-tunneling limitations and restrictions in Cisco 4506-e Sup 7
Last Reply 4 hours 33 min ago.
0 0 0 0 Torgny Holmlund
discussion redistribution from bgp to eigrp
Last Reply 5 hours 27 min ago.
42 0 5 9 milan.kulik
discussion How to Estimate Bandwidth Needs for Your Customers????? “Internet link speed”
Last Reply 5 hours 27 min ago.
8 0 0 2 Joseph W. Doherty
discussion how to convert Tengig port group back to 40gig in 6500 switch
Last Reply 5 hours 31 min ago.
8 0 5 2 shoaib sheikh
discussion SG300-20 Inter VLAN Routing problems
Last Reply 5 hours 37 min ago.
11 0 0 7 dynamotech
discussion Licensing infrastructure is NOT initialized CAT6500
Last Reply 5 hours 59 min ago.
103 1 0 2 Salvador Antoni...
discussion missing mac address-table info?
Last Reply 6 hours 29 min ago.
669 0 0 13 pwwiddicombe
discussion Offset list in EIGRP
Last Reply 6 hours 57 min ago.
25 0 5 3 Jon Marshall
discussion LAN Crashes
Last Reply 7 hours 10 min ago.
68 0 0 15 mark malone
discussion How to monitor N7K frabic throughput
Last Reply 7 hours 31 min ago.
0 0 0 0 fsebera
discussion Cisco Nexus (5000 Series) - Slot 2 (expansion module) configuration
Last Reply 9 hours 15 min ago.
1 0 0 1 kwolfgramm
discussion Adding Aironet 1532i
Last Reply 9 hours 19 min ago.
10 0 0 1 Mohammad Setan
discussion traceroute is not working but pinging
Last Reply 9 hours 37 min ago.
16 0 0 3 milan.kulik
Filter Results
Subject Views Rating Comments Author
Understanding SPAN,RSPAN,and ERSPAN
Last Reply 10 hours 27 min ago.
59686
4.8
7 ashirkar
Using 3850 Embedded Wireshark (Wired)
Last Reply 17 hours 32 min ago.
39589
5.0
3 Colby Beam
How to use Time-Domain Reflectometer (TDR)
Last Reply 3 days 19 hours ago.
91120
5.0
84 Leo Laohoo
Understanding MSFC, PFC and DFC roles in Catalyst 6500 Series Switch
Last Reply 5 days 17 hours ago.
56672
5.0
14 SunilKhanna
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 1 week 1 hour ago.
307391
5.0
43 plumbis
3850 switch - IOS XE upgrade Detailed (standalone)
Last Reply 1 week 3 days ago.
10772
5.0
7 Furose Khan Mohammed Ali
IPV6 on the Cisco 877
Last Reply 2 weeks 18 hours ago.
34769
5.0
0 Andrew Judson
QUICK TIPS: Installing Multiple Cisco Switches - Video
Last Reply 3 weeks 2 days ago.
5
0.0
0 tfortunato
Error Message:%ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface <interface> Power Controller reports power Imax error detected
Last Reply 4 weeks 3 hours ago.
15672
5.0
5 Sivagami Narayanan
DHCP Static Binding on Cisco IOS
Last Reply 1 month 1 day ago.
23
0.0
0 indrapalccna
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 1 month 1 day ago.
50296
4.7
60 ashirkar
OSPF and IS-IS Differences
Last Reply 1 month 1 week ago.
7001
5.0
3 inderdeeps
34 Things about OSPF
Last Reply 1 month 1 week ago.
36
0.0
0 inderdeeps
Nexus - vPC Recommendations
Last Reply 1 month 2 weeks ago.
25582
5.0
4 pnagpal
The Cisco Discovery Protocol displays the "%CDP-4-DUPLEX_MISMATCH" error message on Catalyst fixed configuration switches running IOS software.
Last Reply 1 month 3 weeks ago.
19403
5.0
1 TCC_2
The "%Error formatting slot0 (Can not find flash algorithm)" error message is displayed during an attempt to format the ATA flash card in Cisco Catalyst 6000/6500 series switches
Last Reply 1 month 3 weeks ago.
2552
5.0
1 TCC_2
4500X-32 IOS upgrade procedure
Last Reply 2 months 2 hours ago.
36
0.0
0 butturwa
How to Form a Catalyst 3850 Data-Stack and Power-Stack
Last Reply 2 months 1 week ago.
1115
5.0
2 Luis Villanueva Brito
How to configure Ether Switch Modules connected to a router
Last Reply 2 months 1 week ago.
2499
0.0
2 TCC_2
What is the difference between an IP base image and an IP services image
Last Reply 2 months 2 weeks ago.
202973
5.0
10 tahirshabbir
How to configure a Cisco Catalyst Express 500 series switch
Last Reply 3 months 1 day ago.
18435
5.0
3 TCC_2
Routing Protocol Selection Guide - IGRP, EIGRP, OSPF, IS-IS, BGP
Last Reply 3 months 1 week ago.
156545
4.0
2 Shaun Hummel
3850: Understanding interface configuration on NM modules
Last Reply 3 months 2 weeks ago.
33858
5.0
12 Richard Primm
I am receiving some error like broadcast and input error please see detail, Is it normal ?
Last Reply 4 months 5 days ago.
51
0.0
1 junaidmumtazcisco
SSH version 2 no IOS cat4000-i5s-mz.122-25.EWA14.bin
Last Reply 4 months 2 weeks ago.
54
0.0
2 Sergio Alvares
Filter Results
Subject Views Rating Comments Author
blog Loading an IOS on a switch via Xmodem
Last Reply 3 weeks 2 days ago.
65730
5.0
11 Aninda Chatterjee
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
Last Reply 2 months 21 hours ago.
25010
4.7
13 Akula Jyoti Lakshmi
blog Collector Security
Last Reply 2 months 3 weeks ago.
18
0.0
0 marobbs
blog Who Should Attend The Kickoff Meeting?
Last Reply 3 months 4 days ago.
42
0.0
0 marobbs
blog Network Optimization: The 90-Day Plan
Last Reply 3 months 1 week ago.
52
0.0
0 marobbs
blog Prepare for the Collector
Last Reply 3 months 3 weeks ago.
33
0.0
0 marobbs
blog Expert Insights: Network Optimization
Last Reply 3 months 4 weeks ago.
55
0.0
0 marobbs
blog Network Compliance Analysis
Last Reply 3 months 4 weeks ago.
42
0.0
0 marobbs
blog Three Tips for a Successful Review Period
Last Reply 3 months 4 weeks ago.
44
0.0
0 marobbs
blog Nexus 7000 ACL logging (OAL)
Last Reply 4 months 3 days ago.
18615
5.0
8 Robert Taylor
blog Active /Active Internet Load balancing with High availability ( AS Prepend Path)
Last Reply 4 months 1 week ago.
213
5.0
0 Ganesh Hariharan
blog Output drops due to QoS on 2960/3560/3750 switches
Last Reply 7 months 1 week ago.
28534
5.0
1 Shashank Singh
blog License Activation on 4500
Last Reply 1 year 3 months ago.
773
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 1 year 3 months ago.
7683
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 1 year 6 months ago.
2913
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
Last Reply 1 year 6 months ago.
22242
5.0
3 ajaju
blog Configuring a frame-relay switch
Last Reply 1 year 8 months ago.
7826
5.0
7 Aninda Chatterjee
blog Upcoming Ask the Expert Event Featuring Ahmad Manzoor - Senior Pre-Sales Engineer at AGCN
Last Reply 1 year 9 months ago.
386
5.0
0 Francine Richards
blog Upcoming Ask the Expert Event with Cisco Designated VIP Marwan Al-shawi May 12-23
Last Reply 1 year 9 months ago.
139
0.0
0 Francine Richards
blog Cisco WCCP with Bluecoat (Multicast mode)
Last Reply 1 year 9 months ago.
137
0.0
0 vishal_2007
blog OSPF over IPsec Tunnel stucks in INIT state
Last Reply 1 year 9 months ago.
489
5.0
0 hsticher
blog Pre-build SPT feature on Nexus - Benefits & Caveats
Last Reply 1 year 10 months ago.
1555
5.0
0 srereddy
blog Link de-bounce timer operation when used on SFP+ ports on Nexus switches
Last Reply 1 year 10 months ago.
778
5.0
2 srereddy
blog Flexlink in Cisco Layer 2 network
Last Reply 1 year 10 months ago.
181
5.0
0 Akula Jyoti Lakshmi
blog Community Tech-Talk Series: Troubleshooting High CPU due to Multicast
Last Reply 1 year 10 months ago.
8742
5.0
9 Ruchir Jain
Filter Results
LAN, Switching and Routing
Views: 20965
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 4.8 (4 ratings)
LAN, Switching and Routing
Views: 44
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 1273
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 1302
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 885
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
LAN, Switching and Routing
Views: 418
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 447
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 4 (1 ratings)
LAN, Switching and Routing
Views: 269
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 273
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 659
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
LAN, Switching and Routing
Views: 8
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 53
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 40
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 428
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 711
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 492
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (4 ratings)
LAN, Switching and Routing
Views: 454
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (4 ratings)
LAN, Switching and Routing
Views: 15
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 339
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (2 ratings)
LAN, Switching and Routing
Views: 230
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Filter Results

This Month

Events

October 4, 2015
Ask the Expert
September 7, 2015
Ask the Expert
May 11, 2015
Ask the Expert
April 13, 2015
Ask the Expert
January 5, 2015
Ask the Expert
July 21, 2014
Ask the Expert
March 31, 2014
Ask the Expert
April 1, 2014
Webcasts
March 10, 2014
Webcasts
  • 1
  • 2
  • 3
  • 4
  • 5
July 29, 2012
Ask the Expert
December 12, 2012
Techtalks
  • 1
  • 2
  • 3
  • 4
  • 5
July 26, 2012
Facebook Forums
  • 1
  • 2
  • 3
  • 4
  • 5
December 31, 1969
Facebook Forums
May 24, 2012
Facebook Forums
  • 1
  • 2
  • 3
  • 4
  • 5
October 10, 2011
Facebook Forums
  • 1
  • 2
  • 3
  • 4
  • 5
January 6, 2014
Ask the Expert
  • 1
  • 2
  • 3
  • 4
  • 5
January 17, 2012
Webcasts
October 10, 2009
Ask the Expert
  • 1
  • 2
  • 3
  • 4
  • 5
July 31, 2011
Ask the Expert
  • 1
  • 2
  • 3
  • 4
  • 5
August 14, 2011
Ask the Expert
  • 1
  • 2
  • 3
  • 4
  • 5
August 28, 2011
Ask the Expert
  • 1
  • 2
  • 3
  • 4
  • 5

Actions

 
 

Popular Discussions

Popular Documents

Rank Username Points
1 18,610
2 10,447
3 9,010
4 8,465
5 8,255
Rank Username Points
224
185
177
152
119