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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discussion Networking PCs??
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556 0 4 3 JohnHumphrey
discussion low cost Internet loadbalancing solutions?
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560 0 5 1 jipurser
discussion Will Cisco 857 solve my problem?
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420 0 5 3 rob.huffman
discussion Recommendation for router to replace Cisco 837
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504 0 5 2 harry.dass
discussion What does Minfail mean for STATUS of modules in CAT6500 switch
Last Reply 9 years 4 months ago.
2123 0 5 1 jolmo
discussion ICMP Redirects
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486 0 3 1 m.sir
discussion hsrp or vrrp
Last Reply 9 years 4 months ago.
787 0 0 3 andrew.burns
discussion Utilzation of 3750 Back Plane
Last Reply 9 years 4 months ago.
567 0 0 1 royalblues
discussion Static ARP on an LD?
Last Reply 9 years 4 months ago.
234 0 5 8 jenkdan73
discussion load balance
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312 0 0 0 carl_townshend
discussion problem with routing
Last Reply 9 years 4 months ago.
234 0 0 7 Edison Ortiz
discussion SUP2 to SUP720 Upgrade
Last Reply 9 years 4 months ago.
433 0 5 4 kirkster
discussion Another Etherchannel causing STP loops problem
Last Reply 9 years 4 months ago.
644 0 0 10 kirkster
discussion HSRP Preempt problem..~~~
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254 0 4.5 2 royalblues
discussion vrf lite
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421 0 0 2 mheusinger
discussion catalyst 65xx and dfc3b cards
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249 0 0 3 kirkster
discussion spanning tree
Last Reply 9 years 4 months ago.
188 0 4 1 Collin Clark
discussion help required in module compatibility
Last Reply 9 years 4 months ago.
180 0 5 1 Edison Ortiz
discussion EIGRP - Goodbye Message
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914 0 0 1 lloyd_andrew
discussion 871w - wired clients get no IP using DHCP
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587 0 0 5 george@ntdigital.com
discussion Access-list matches
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597 0 5 1 Edison Ortiz
discussion Southbend
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229 0 0 2 jward@primetech...
discussion VLAN tagging and prioritization
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626 0 0 7 Collin Clark
discussion Port Security behaviour with CatOS and IOS
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185 0 0 1 mchin345
discussion Dot1x with Nortel VoIP
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208 0 0 1 wong34539@yahoo.com
Filter Results
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Add port To Vlan
Last Reply 6 years 8 months ago.
81338
5.0
0 ITA Terms
Module status shows unsupported module when installed in slot 10 of the Catalyst 4510R Switch chassis with Supervisor V
Last Reply 6 years 8 months ago.
1102
0.0
0 SunilKhanna
MAC Addresses used by the Cisco 3750
Last Reply 6 years 8 months ago.
1658
0.0
0 Oliver Gorwits
SFP
Last Reply 6 years 8 months ago.
4100
0.0
0 ITA Terms
CEF
Last Reply 6 years 7 months ago.
1162
0.0
0 ITA Terms
Error Message received, but is not currently listed in the LAN Switching knowledge base.
Last Reply 6 years 7 months ago.
175
0.0
0 TCC_2
The %SYS-3-PORT_OUT_DISCARD: intermittent port error messages are received in Catalyst 6500 Series Switches that run CatOS software
Last Reply 6 years 7 months ago.
2913
0.0
0 TCC_2
The WS-X6724-SFP module with DFC3A resets with the "%SYS-DFC7-2-MALLOCFAIL" error message in Cisco Catalyst 6500 switches that run Cisco IOS Software
Last Reply 6 years 7 months ago.
368
0.0
0 TCC_2
How to configure a Voice-over-IP (VoIP) network on the Cisco Catalyst 6500 series switches
Last Reply 6 years 7 months ago.
1089
0.0
0 TCC_2
The MSFC reloads and goes into ROMmon mode after the PFC version detected does not match configured version error appears
Last Reply 6 years 7 months ago.
538
0.0
0 TCC_2
A Cisco Catalyst 6500 or 6000 series switch running CatOS logs the SYS-3-SYS_LCPERR3 syslog error message
Last Reply 6 years 7 months ago.
335
0.0
0 TCC_2
A Catalyst 6000 family switch with dual MSFCs displays the %IPC-5-NULL: Registering Control Port Id=0x2210003 message approximately every 30 seconds
Last Reply 6 years 7 months ago.
188
0.0
0 TCC_2
Users receive the "%ONLINE-SP-6-DNLDFAIL" error message in the logs of a Catalyst 6500 series switch
Last Reply 6 years 7 months ago.
701
0.0
0 TCC_2
Input errors on the Layer-3 interface of Catalyst 6500 switch running Cisco IOS when connected to the Layer-2 switchport of CatOS switch
Last Reply 6 years 7 months ago.
1404
0.0
0 TCC_2
Output scrolls by and does not stop when "show" commands are issued
Last Reply 6 years 7 months ago.
13355
5.0
0 TCC_2
Create VLAN In Text Mode
Last Reply 6 years 7 months ago.
768
0.0
0 Justin Reeve
Comparison Cisco Catalyst and Cisco IOS Operating Systems
Last Reply 6 years 7 months ago.
1658
0.0
0 SunilKhanna
Cisco Catalyst 4500 E-Series Switches
Last Reply 6 years 7 months ago.
2098
0.0
0 Roberto Cruz
Cisco Catalyst 2950T 48 SI Switch
Last Reply 6 years 7 months ago.
1465
0.0
0 Ashley Price
How NetFlow works when only one of the two supervisors has a NetFlow Services Card (WS-F4531) in Cisco Catalyst 4500/4000 running Cisco IOS
Last Reply 6 years 6 months ago.
784
0.0
0 TCC_2
Configuring EtherChannel results in ports being errdisabled, and fails to form channels due to spanning tree loops caused by VLAN misconfiguration
Last Reply 6 years 6 months ago.
436
0.0
0 TCC_2
User receives the "%SYS-5-SYS_LCPERR5:Coil Pinnacle Header Checksum" error message on a 6248 or 6348 line card installed in a Catalyst 6000 Series platform due to either a hardware or software issue
Last Reply 6 years 6 months ago.
1006
0.0
0 TCC_2
High CPU utilization on a Catalyst 4500 when connected to an IP phone that uses trunk ports
Last Reply 6 years 6 months ago.
620
0.0
0 TCC_2
How to keep a VLAN in an "UP/UP" state with no clients or hosts connected in that VLAN
Last Reply 6 years 6 months ago.
1972
0.0
0 TCC_2
Unable to Telnet to other devices, and the %telnet connections not permitted from this terminal error message is received when an attempt is made to session to other modules
Last Reply 6 years 6 months ago.
11213
5.0
0 TCC_2
Filter Results
Subjectsort descending Views Rating Comments Author
blog MPLS Conference 2010 and Cisco Leadership
Last Reply 5 years 2 months ago.
3129
0.0
0 mmorrow
blog From Internet of Things to Web of Things
Last Reply 5 years 1 week ago.
2551
0.0
0 mmorrow
blog FabricPath: Cisco’s New Technology of Extending Layer 2 Network Without Spanning Tree
Last Reply 5 years 1 week ago.
3261
0.0
0 TS-newsletter
blog Cloud Computing: Update ITU-T Focus Group and OMG-Hosted Telecom Cloud Conference
Last Reply 4 years 11 months ago.
1558
0.0
2 mmorrow
blog The best CCO document link for Peer-Gateway on vPC/Nexus7000
Last Reply 4 years 10 months ago.
4560
5.0
0 kyukim
blog Converting IOS to CatOS in Production Switch
Last Reply 4 years 6 months ago.
2446
3.0
6 Tripat Singh
blog Machine-to-Machine Communications as a Subset of Internet of Things
Last Reply 4 years 5 months ago.
2106
0.0
0 mmorrow
blog Troubleshoot L2 Connectivity Issue : VTP PRUNING
Last Reply 4 years 3 months ago.
7620
5.0
3 rparames
blog Upcoming Webcast: Troubleshooting Tools to Analyze High CPU Utilization Issues on Cisco Catalyst 6500 Series Switches
Last Reply 4 years 1 month ago.
1660
0.0
0 ciscomoderator
blog Troubleshooting L2 issues - ARP Poisoning
Last Reply 4 years 3 weeks ago.
8205
0.0
4 rparames
blog Moving Beyond the Internet of Things in 2012
Last Reply 4 years 1 week ago.
1713
5.0
0 mmorrow
blog New Cisco 5915 ESR
Last Reply 3 years 8 months ago.
4264
5.0
2 Sonal Singh
blog Important Nexus 7000 NX-OS Software Update
Last Reply 3 years 8 months ago.
4099
5.0
0 ctripoli
blog Leak Map - Eigrp, Some leaks are useful..
Last Reply 3 years 7 months ago.
12757
5.0
7 pnagpal
blog Router Crashes
Last Reply 3 years 3 months ago.
6029
5.0
1 ajaju
blog Multicast for the heart Part I: IGMP
Last Reply 3 years 2 months ago.
4863
4.8
1 Aninda Chatterjee
blog Parity Error.
Last Reply 2 years 6 months ago.
2571
4.5
4 InayathUlla Sharieff
blog About "TestErrorCounterMonitor" in 6500/7600
Last Reply 2 years 5 months ago.
2389
4.7
1 Anand G
blog Switch: How to test a cable status?
Last Reply 1 year 10 months ago.
12032
5.0
3 Anand G
blog Chalk Talk: The Secret to Successful QoS Deployments: A Well-Defined End-to-End QoS Strate
Last Reply 1 year 10 months ago.
337
0.0
0 Julie Burruss
blog Community Tech-Talk Series: Troubleshooting High CPU due to Multicast
Last Reply 1 year 10 months ago.
8742
5.0
9 Ruchir Jain
blog Flexlink in Cisco Layer 2 network
Last Reply 1 year 10 months ago.
181
5.0
0 Akula Jyoti Lakshmi
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 Pre-build SPT feature on Nexus - Benefits & Caveats
Last Reply 1 year 10 months ago.
1555
5.0
0 srereddy
blog OSPF over IPsec Tunnel stucks in INIT state
Last Reply 1 year 9 months ago.
489
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0 hsticher
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