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 Views Votes Rating Replies Last replied by
discussion InterVLAN routing - Router or Switch as gateway Best practice
Last Reply 12 min 14 sec ago.
0 0 0 2 JATINDER KUMAR
discussion (Undefined error) message --> scp:/ flash:/ ASR1004 Solarwinds
Last Reply 19 min 17 sec ago.
0 0 0 0 PACOM-Imperial
discussion (Undefined error) message --> scp:/ flash:/ ASR1004 Solarwinds
Last Reply 19 min 21 sec ago.
0 0 0 0 PACOM-Imperial
discussion Network designed issue
Last Reply 1 hour 34 min ago.
0 0 5 2 opnineopnine
discussion DNS entry for configuration server gets cached or looked-up again?
Last Reply 1 hour 48 min ago.
0 0 0 0 aeisenac
discussion Stratix 5700 Copper SFP
Last Reply 2 hours 21 min ago.
0 0 0 2 petkos@mosebach.com
discussion GBIC IMP
Last Reply 3 hours 31 min ago.
0 0 0 1 Ganesh Hariharan
discussion Interesting Mac Address Flap issue
Last Reply 3 hours 43 min ago.
0 0 3 3 Ganesh Hariharan
discussion Understanding Fabricpath LID
Last Reply 3 hours 43 min ago.
0 0 0 1 verma_amit1
discussion Access all traffic through Proxy Server, except SMPT and POP
Last Reply 3 hours 46 min ago.
0 0 0 2 Ganesh Hariharan
discussion SG220 Series "Input Errors" on interfaces
Last Reply 3 hours 47 min ago.
0 0 0 0 pmcallion
discussion QSFP to 4x SFP cable (e.g. QSFP-4X10G-AC7M)
Last Reply 3 hours 48 min ago.
30 0 5 7 Iulian Vaideanu
discussion Stacking issues between
Last Reply 5 hours 11 min ago.
0 0 0 4 Joseph W. Doherty
discussion Static Route through VPN
Last Reply 5 hours 34 min ago.
42 0 5 9 Karsten Iwen
discussion Multicast routing on C2960XR
Last Reply 5 hours 42 min ago.
0 0 0 5 triton.milossedlacek
discussion Nexus 5k Scheduled Reload
Last Reply 6 hours 6 min ago.
3119 6 0 9 Clinton Neill
discussion checking my certification status
Last Reply 6 hours 6 min ago.
0 0 0 1 Marvin Rhoads
discussion DHCP Snooping and Duplicate Address Messages From Clients
Last Reply 7 hours 7 min ago.
0 0 0 1 mark malone
discussion Plugging in CISCO GLC-T 1000BASE-T SFP TRANSCEIVER MODULE 30-1410-02 into a Catalyst 3750 Switch Gigabit Port
Last Reply 7 hours 24 min ago.
0 0 4 3 pwwiddicombe
discussion strange port utilization
Last Reply 7 hours 29 min ago.
9 0 0 2 pwwiddicombe
discussion Switch reboot continuously
Last Reply 8 hours 36 min ago.
30 0 0 5 rebichada1
discussion POE Switches vs Non POE Devices
Last Reply 10 hours 38 min ago.
62 1 0 1 peterpickem
discussion Cisco Nexus 9372TX Switch
Last Reply 11 hours 5 min ago.
31 0 5 7 dukenuk96
discussion STP Loopback error and Keepalive : ETHCNTR-3-LOOP_BACK_DETECTED
Last Reply 11 hours 8 min ago.
88 0 0 13 Mohamed
discussion %STORM_CONTROL-3-SHUTDOWN - How do know if mulitcast or broadcast triggered it
Last Reply 11 hours 10 min ago.
38 1 0 7 jmandersson
Filter Results
Subject Views Ratingsort descending Comments Author
CEF
Last Reply 6 years 8 months ago.
1162
0.0
0 ITA Terms
Catalyst 4948
Last Reply 6 years 6 months ago.
1649
0.0
0 Ashley Price
Cisco_Catalyst_6506-E_Switch
Last Reply 6 years 6 months ago.
1888
0.0
0 Ashley Price
Cisco_Catalyst_6509-E_Switch
Last Reply 6 years 6 months ago.
2554
0.0
0 Ashley Price
SFP
Last Reply 6 years 8 months ago.
4100
0.0
0 ITA Terms
GARP
Last Reply 6 years 6 months ago.
7399
0.0
0 ITA Terms
GMRP
Last Reply 5 years 3 days ago.
4642
0.0
0 ITA Terms
How to Configure Private Hosts in a Cisco Catalyst 6500 switch
Last Reply 6 years 6 months ago.
2161
0.0
0 SunilKhanna
MAC Addresses used by the Cisco 3750
Last Reply 6 years 8 months ago.
1658
0.0
0 Oliver Gorwits
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
The power management and environmental monitoring features on the Cisco Catalyst 4000/4500 switches
Last Reply 6 years 6 months ago.
261
0.0
0 TCC_2
The %SUPQ-4-CPUHB_RECV_STARVE: Still seeing receive queue stuck after throttling error message is displayed in the logs of Cisco Catalyst 2970, Catalyst 3560, or Catalyst 3750 Metro series switches running Cisco IOS System Software
Last Reply 10 months 4 weeks ago.
8358
0.0
1 TCC_2
The %SIBYTE-CFC3-6-SB_RMON_OVRFL: RMON register 20 overflow on mac 1 error message receieved in Catalyst 6500 series switches that runs Cisco IOS system software
Last Reply 6 years 6 months ago.
1786
0.0
0 TCC_2
An active Supervisor Engine 720 crashes after a redundant supervisor is inserted in Catalyst 6500 and Catalyst 7600 series switches
Last Reply 6 years 6 months ago.
875
0.0
0 TCC_2
How to get the heat tolerance and environment monitoring on a Catalyst 6500/6000 series switches
Last Reply 4 years 5 months ago.
522
0.0
1 TCC_2
The "%C6KENV-SP-4-FANPSINCOMPAT: Fan tray and power supply 1 are incompatible error message appears in Catalyst 6500 series switches that runs the Cisco IOS system
Last Reply 6 years 6 months ago.
2013
0.0
0 TCC_2
Ports go into err-disable with the %PHY-4-SFP_NOT_SUPPORTED: error message when connecting Catalyst 3560 and Catalyst 3750 Switches using an SFP Interconnect Cable
Last Reply 6 years 6 months ago.
2841
0.0
0 TCC_2
How to remove or erase unused port channel configs in the Catalyst 6500 that runs the CatOS system software
Last Reply 6 years 6 months ago.
1504
0.0
0 TCC_2
How to configure SPAN and RSPAN on Cisco Catalyst 4500 switches that run Cisco IOS Software
Last Reply 6 years 6 months ago.
11579
0.0
0 TCC_2
User receives periodic %SPANTREE-3-PORTDEL_FAILNOTFOUND syslog messages
Last Reply 6 years 6 months ago.
660
0.0
0 TCC_2
The %SYS-4-P2_WARN: 1/Blocked queue (tx) on port error message is displayed on a Cisco Catalyst 4000 series switch running CatOS
Last Reply 6 years 6 months ago.
478
0.0
0 TCC_2
The "%C4K_SWITCHMANAGER-4-S2WERRORREPORT" error message appears in the logs of a Cisco Catalyst 4500 Switch, and affects the functionality of PoE line cards
Last Reply 9 months 1 week ago.
8804
0.0
1 TCC_2
How to enable/disable SPAN reflector feature in Catalyst 6500 series switches with the FWSM module
Last Reply 3 years 2 weeks ago.
4369
0.0
0 TCC_2
Ping issues between service modules and the rest of the network with cross-module etherchannel in Catalyst 6500 Series Switches with Supervisor 720 that runs native Cisco IOS
Last Reply 6 years 6 months ago.
463
0.0
0 TCC_2
A self-signed certificate is added to a Cisco Catalyst switch that is managed through HTTPS
Last Reply 6 years 6 months ago.
2132
0.0
0 TCC_2
Filter Results
Subject Views Ratingsort descending Comments Author
blog MPLS Conference 2010 and Cisco Leadership
Last Reply 5 years 2 months ago.
3129
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0 mmorrow
blog Cloud Computing: Update ITU-T Focus Group and OMG-Hosted Telecom Cloud Conference
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1558
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2 mmorrow
blog From Internet of Things to Web of Things
Last Reply 5 years 2 weeks ago.
2551
0.0
0 mmorrow
blog FabricPath: Cisco’s New Technology of Extending Layer 2 Network Without Spanning Tree
Last Reply 5 years 2 weeks ago.
3262
0.0
0 TS-newsletter
blog Machine-to-Machine Communications as a Subset of Internet of Things
Last Reply 4 years 6 months ago.
2106
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0 mmorrow
blog Troubleshooting L2 issues - ARP Poisoning
Last Reply 4 years 3 weeks ago.
8241
0.0
4 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
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0 ciscomoderator
blog Chalk Talk: The Secret to Successful QoS Deployments: A Well-Defined End-to-End QoS Strate
Last Reply 1 year 10 months ago.
340
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0 Julie Burruss
blog Cisco WCCP with Bluecoat (Multicast mode)
Last Reply 1 year 9 months ago.
138
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0 vishal_2007
blog Upcoming Ask the Expert Event with Cisco Designated VIP Marwan Al-shawi May 12-23
Last Reply 1 year 9 months ago.
139
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0 Francine Richards
blog License Activation on 4500
Last Reply 1 year 3 months ago.
788
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1 sheraz butt
blog Three Tips for a Successful Review Period
Last Reply 4 months 5 days ago.
45
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0 marobbs
blog Network Compliance Analysis
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blog Expert Insights: Network Optimization
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blog Prepare for the Collector
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blog Who Should Attend The Kickoff Meeting?
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blog Collector Security
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blog Converting IOS to CatOS in Production Switch
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blog Parity Error.
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blog About "TestErrorCounterMonitor" in 6500/7600
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blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
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blog Multicast for the heart Part I: IGMP
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blog Nexus 7000 ACL logging (OAL)
Last Reply 4 months 1 week ago.
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blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 1 year 4 months ago.
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