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 Nexus 3000 Automating config backups with FTP Password
Last Reply 9 min 43 sec ago.
14 0 0 2 jhallam01
discussion Adding subnets to ASA 5505 basic
Last Reply 16 min 29 sec ago.
21 0 0 4 Jon Marshall
discussion Unable to access 3850 switch stack via serial port or ssh
Last Reply 31 min 3 sec ago.
109 2 0 6 ogmis1r
discussion QoS - Trusting DSCP or CoS
Last Reply 39 min 53 sec ago.
19 0 0 6 Jon Marshall
discussion how to convert Tengig port group back to 40gig in 6500 switch
Last Reply 51 min 21 sec ago.
8 0 0 1 Jon Marshall
discussion Connecting a Catalyst 3560CX-8XPD-S switch to 1G optical network
Last Reply 1 hour 2 min ago.
36 0 5 9 tehuti2016
discussion LAN Crashes
Last Reply 1 hour 15 min ago.
34 0 0 9 mark malone
discussion Ask the Expert: Troubleshooting High CPU in Catalyst Switches
Last Reply 1 hour 50 min ago.
1467 4 5 63 Abhishek Soni
discussion 6500 SUP720 upgrade problem
Last Reply 2 hours 38 min ago.
79 0 0 13 Christos Papage...
discussion Cisco Stacking
Last Reply 2 hours 44 min ago.
2 0 0 2 Joseph W. Doherty
discussion VTP Msgs between 2 switches, via a Router
Last Reply 3 hours 9 min ago.
10 0 5 2 elmoutaallikbil...
discussion Cisco SG300, SG500 , 2960X spanning tree none compatibility behavior.
Last Reply 3 hours 21 min ago.
14 0 0 1 filopeter
discussion Route Leak Between Global and VRF on Nexus
Last Reply 3 hours 56 min ago.
0 0 0 0 CSCO11582967
discussion EIGRP best path selection two AS
Last Reply 3 hours 58 min ago.
37 0 5 11 amaksimenko1
discussion Cisco WS-C6509-E Rommon Mode
Last Reply 4 hours 6 min ago.
16 0 0 4 Md.Mahmudul Hasan
discussion Cisco Nexus (5000 Series) - Slot 2 (expansion module) configuration
Last Reply 4 hours 35 min ago.
1 0 0 0 kwolfgramm
discussion What is wrong...? vPC question
Last Reply 4 hours 40 min ago.
1 0 5 4 mark malone
discussion Cisco Nexus 9372TX Switch
Last Reply 4 hours 43 min ago.
2 0 0 1 dukenuk96
discussion QoS
Last Reply 4 hours 56 min ago.
27 0 0 10 eXPlosion
discussion wireless c3702e
Last Reply 4 hours 57 min ago.
0 0 0 0 NITIN RAI
discussion NAT + PBR question
Last Reply 5 hours 16 min ago.
2 0 0 5 Boris Uskov
discussion What is wrong...? vPC question
Last Reply 5 hours 25 min ago.
0 0 0 0 joyride_us2
discussion VSS in Cisco C 4500-X switches
Last Reply 6 hours 21 min ago.
23 0 4.5 7 Ashish Kumar
discussion Inconsistent Peer VLAN Error
Last Reply 6 hours 27 min ago.
20 0 5 3 mark malone
discussion Unable to Access Cisco 2960 from all VLANs Except one
Last Reply 6 hours 28 min ago.
81 0 5 11 jain.manish94
Filter Results
Subject Views Rating Comments Author
How to use Time-Domain Reflectometer (TDR)
Last Reply 2 days 11 hours ago.
91120
5.0
84 Leo Laohoo
Understanding MSFC, PFC and DFC roles in Catalyst 6500 Series Switch
Last Reply 4 days 9 hours ago.
56672
5.0
14 SunilKhanna
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 5 days 17 hours ago.
307391
5.0
43 plumbis
3850 switch - IOS XE upgrade Detailed (standalone)
Last Reply 1 week 2 days ago.
10772
5.0
7 Furose Khan Mohammed Ali
IPV6 on the Cisco 877
Last Reply 1 week 6 days ago.
34769
5.0
0 Andrew Judson
QUICK TIPS: Installing Multiple Cisco Switches - Video
Last Reply 3 weeks 23 hours 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 3 weeks 5 days ago.
15672
5.0
5 Sivagami Narayanan
DHCP Static Binding on Cisco IOS
Last Reply 1 month 3 hours ago.
23
0.0
0 indrapalccna
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 1 month 6 hours 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 1 month 4 weeks 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 2 months 4 weeks 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 3 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
SSH/Telnet not happening to Catalyst 6K due to SSH RSA_Sign:Private key not found.
Last Reply 4 months 3 weeks ago.
51
5.0
0 InayathUlla Sharieff
copying image on the Standby Sup issue sometimes seen < Unknown error 0>
Last Reply 4 months 3 weeks ago.
67
0.0
0 InayathUlla Sharieff
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 18,595
2 10,442
3 8,985
4 8,460
5 8,250
Rank Username Points
209
177
160
147
134