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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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
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Subject Viewssort ascending Votes Rating Replies Last replied by
discussion Cisco switch 2960/3560=> Password recovery and Factory Default with Mode Button
Last Reply 10 months 4 days ago.
244014 0 4.5 10 Enrique Soto M
discussion Cisco Serial Number Lookups
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225943 1 4.92857 7 Jeffrey Yentz
discussion cisco mini usb console driver for win 7
Last Reply 5 months 2 weeks ago.
217482 9 5 3 rmfred1952
discussion BGP Configuration
Last Reply 3 years 1 month ago.
205542 0 5 18 John Blakley
discussion Set Username & Password on Cisco 3750 Switch
Last Reply 3 years 2 months ago.
148144 0 4.6 12 John Blakley
discussion Cisco ASDM download
Last Reply 8 years 9 months ago.
146031 1 3.5 4 Anand S
discussion Difference between clear arp-cache and clear ip arp
Last Reply 4 years 4 months ago.
117031 0 5 3 onslaught99
discussion deleting a directory in flash:
Last Reply 1 month 3 weeks ago.
96933 4 4.66667 22 pathiksohel
discussion How can I determine the IP address of my Cisco 2950 switch?
Last Reply 1 year 6 months ago.
81679 0 0 16 sheabernard
discussion ip forward-protocol nd??
Last Reply 4 years 7 months ago.
80384 0 5 8 lcaruso
discussion Error opening tftp (Timed out)
Last Reply 1 day 16 hours ago.
74676 3 4.33333 47 rameshprabhu
discussion Catalyst 2950, need to reset to factory defaults. Lost password.
Last Reply 4 years 4 months ago.
74642 0 5 1 Reza Sharifi
discussion Default password for Catalyst 2960-C Layer 3 Switch
Last Reply 1 year 8 months ago.
74377 0 0 11 Richard Burts
discussion how to reset cisco router 1841 password
Last Reply 1 year 1 month ago.
73140 0 5 13 mmcgrane
discussion Ask the Expert: Nexus Virtual Port Channel (vPC)
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71431 0 4.9 36 habadr
discussion Hulc LED Process
Last Reply 3 months 2 weeks ago.
70154 4 5 31 Askar Abdrakhmanov
discussion load-interval 30
Last Reply 7 years 9 months ago.
64488 1 5 7 Joseph W. Doherty
discussion 2960S - Password required, but none set
Last Reply 9 months 3 weeks ago.
64254 2 6.66667 16 craig.wells
discussion Vlan UP line protocol Down
Last Reply 5 years 11 months ago.
62357 0 5 3 Ganesh Hariharan
discussion no ip unreachables
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60210 0 4.5 8 Umesh Shetty
discussion How to Abort Traceroute Execution?
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57968 1 5 14 johnbehring
discussion What exactly does mac-address sticky do?
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49022 1 5 6 tgrundbacher
discussion Uplink Ports vs Normal Ports
Last Reply 2 years 3 months ago.
48487 2 4 11 Joseph W. Doherty
discussion How to stack 2 3750 switches?
Last Reply 5 years 2 months ago.
47535 0 4.5 11 gnaveen
discussion reset the 3750 to factory default
Last Reply 7 months 12 hours ago.
46054 0 0 4 hailsun
Filter Results
Subject Viewssort ascending Rating Comments Author
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 1 week 2 days ago.
307391
5.0
43 plumbis
How to define the VLANs allowed on a trunk link
Last Reply 5 months 4 weeks ago.
232644
5.0
3 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 port monitoring (SPAN) on a Catalyst 2940, 2950, 2955, 2970, 3550 or 3750 series switch
Last Reply 6 years 6 months ago.
173223
0.0
0 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
Importance of BPDU Guard and BPDU Filter !!
Last Reply 8 months 2 weeks ago.
125739
4.7
12 Ganesh Hariharan
How to configure the ip default-gateway command on a Cisco 3550 series switch
Last Reply 6 years 6 months ago.
112271
5.0
0 TCC_2
How to configure jumbo or giant frame support on a Cisco Catalyst switch
Last Reply 6 years 6 months ago.
92552
0.0
0 TCC_2
How to use Time-Domain Reflectometer (TDR)
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91120
5.0
84 Leo Laohoo
Add port To Vlan
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81338
5.0
0 ITA Terms
How to find and display the GBIC and SFP module details installed in Catalyst 6500 series switches
Last Reply 6 years 6 months ago.
63393
5.0
0 TCC_2
CAM (Content Addressable Memory) VS TCAM (Ternary Content Addressable Memory)
Last Reply 5 months 3 weeks ago.
62731
4.6
7 Thamaraiselvam Santhanam
Spanning Tree Loop Troubleshooting and Safeguards
Last Reply 9 months 3 days ago.
59698
5.0
2 James D Hensley
Understanding SPAN,RSPAN,and ERSPAN
Last Reply 2 days 10 hours ago.
59686
4.8
7 ashirkar
Egress QOS
Last Reply 5 months 2 weeks ago.
58183
5.0
14 somgupta
Understanding MSFC, PFC and DFC roles in Catalyst 6500 Series Switch
Last Reply 1 week 17 hours ago.
56672
5.0
14 SunilKhanna
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 1 month 3 days ago.
50296
4.7
60 ashirkar
How to disable STP on a per port basis in Cisco Catalyst switches
Last Reply 6 years 6 months ago.
50092
0.0
0 TCC_2
How to add and remove a Cisco Catalyst 3750 switch from the existing switch stack
Last Reply 6 years 6 months ago.
46987
0.0
0 TCC_2
Port status is errdisable due to BPDU guard
Last Reply 3 years 1 week ago.
46779
0.0
0 TCC_2
How to configure port security on Cisco Catalyst switches that run Cisco IOS system software
Last Reply 3 years 1 month ago.
43213
5.0
0 TCC_2
OSPF Design Best Practices
Last Reply 1 year 3 weeks ago.
41674
0.0
2 pnagpal
How to configure a Cisco router as TFTP server
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39647
4.0
1 TCC_2
Using 3850 Embedded Wireshark (Wired)
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39589
5.0
3 Colby Beam
How to replace or hot swap modules in a Catalyst 6500 series switch
Last Reply 6 years 6 months ago.
38590
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0 TCC_2
Filter Results
Subject Viewssort ascending Rating Comments Author
blog Loading an IOS on a switch via Xmodem
Last Reply 4 weeks 1 day ago.
66509
5.0
11 Aninda Chatterjee
blog Output drops due to QoS on 2960/3560/3750 switches
Last Reply 7 months 2 weeks ago.
28619
5.0
1 Shashank Singh
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
Last Reply 2 months 6 days ago.
25183
4.7
13 Akula Jyoti Lakshmi
blog Booting Cisco Router from a TFTP server
Last Reply 1 year 7 months ago.
22416
5.0
3 ajaju
blog Nexus 7000 ACL logging (OAL)
Last Reply 4 months 1 week ago.
18685
5.0
8 Robert Taylor
blog Leak Map - Eigrp, Some leaks are useful..
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12806
5.0
7 pnagpal
blog Switch: How to test a cable status?
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12233
5.0
3 Anand G
blog Community Tech-Talk Series: Troubleshooting High CPU due to Multicast
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8767
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9 Ruchir Jain
blog Troubleshooting L2 issues - ARP Poisoning
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8244
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4 rparames
blog Configuring a frame-relay switch
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7882
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7 Aninda Chatterjee
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7706
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7 Robert Taylor
blog Troubleshoot L2 Connectivity Issue : VTP PRUNING
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7635
5.0
3 rparames
blog Router Crashes
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6031
5.0
1 ajaju
blog Multicast for the heart Part I: IGMP
Last Reply 3 years 2 months ago.
4872
4.8
1 Aninda Chatterjee
blog The best CCO document link for Peer-Gateway on vPC/Nexus7000
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4560
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0 kyukim
blog New Cisco 5915 ESR
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4267
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2 Sonal Singh
blog Important Nexus 7000 NX-OS Software Update
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4099
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0 ctripoli
blog FabricPath: Cisco’s New Technology of Extending Layer 2 Network Without Spanning Tree
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3263
0.0
0 TS-newsletter
blog MPLS Conference 2010 and Cisco Leadership
Last Reply 5 years 2 months ago.
3129
0.0
0 mmorrow
blog How to build the topology of an OSPF area
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2921
5.0
5 Aninda Chatterjee
blog Parity Error.
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2576
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blog From Internet of Things to Web of Things
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2551
0.0
0 mmorrow
blog Converting IOS to CatOS in Production Switch
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2446
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6 Tripat Singh
blog About "TestErrorCounterMonitor" in 6500/7600
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blog Machine-to-Machine Communications as a Subset of Internet of Things
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0 mmorrow
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