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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I am opening this post OS upgrade for my Nexus 5k devices.  The upgrade completed successfully but I am not comfortable with events during the upgr...
by rmeans
56 min 21 sec ago
Hi guys,can you have a layer 3 vlans routing lan traffic, then have a layer 2 vlan connected to a router thats connected to the internet and have a...
18 hours 50 min ago
Hi,I am setting up dot1x and mab authentication on cisco 2960s switches (multi-auth). we have avaya ip phones connected to switch ports. Sometimes...
19 hours 28 min ago
I need step by step instructions to copy or mirror from a port to an ip address  on a virtual on the sg 200-08
1 day 9 hours ago
I believe I need to setup an igmp proxy and need a little help. I found this document http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst385...
1 day 20 hours ago
         
IP SLA 325 3 0 0 0
Routers 2 0 0 0 0
Switches 6738 569 6 1 0
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discussion Cisco 4503 "1000BaseLH" SFP light is not coming ---- Urgent
Last Reply 54 sec ago.
1 0 0.0 3 Reza Sharifi
discussion Nexus 5596 OS upgrade delay
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0 0 0.0 0 rmeans
discussion ip subnet-zero
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0 0 0.0 1 Reza Sharifi
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89 0 5 21 Jon Marshall
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2 0 0.0 1 Jon Marshall
discussion Converting L3 to L2 switch
Last Reply 3 hours 51 min ago.
2 0 0.0 1 Jon Marshall
discussion Reason for the switch uplink and the network design - really wanted to know ;)
Last Reply 4 hours 23 min ago.
83 0 5 13 Jon Marshall
discussion IGMP snooping when there is no querier
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9 0 0.0 1 Jon Marshall
discussion CISCO 6500 VS HUAWEI S9700
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7 0 0.0 2 MMoharam1
discussion cisco DHCP
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44 0 0.0 4 ciscoreg2
discussion NEXUS 3548 with 24 Port License
Last Reply 8 hours 34 min ago.
39 0 0.0 3 andreabat72
discussion Invalid ARP
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44 0 5 6 Almantas Skarbalius
discussion N5k change VRF name under management interface
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30 0 5 5 Steven112
discussion Cisco C4503-E is being reloaded without a reason
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25 0 0.0 4 Mohamed Saad
discussion Management IP unreachable
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19 0 5 2 ethem.beyazit1
discussion Network Design Questions
Last Reply 15 hours 27 min ago.
39 0 0.0 5 Jon Marshall
discussion Vlan segregation
Last Reply 18 hours 50 min ago.
24 0 0.0 0 jbrickley2006
discussion Some IP Phones unable to communicate on voice vlan after configuration of dot1x and mab.
Last Reply 19 hours 28 min ago.
10 0 0.0 0 pietrulewiczmarek
discussion Design help
Last Reply 19 hours 48 min ago.
5 0 0.0 1 Reza Sharifi
discussion How to avoid Dual Active VSS switches in the network...
Last Reply 20 hours 55 min ago.
29 0 0.0 4 vishal agavane
discussion ARP Inspection issue
Last Reply 20 hours 41 min ago.
12 0 0.0 1 cehill
discussion Automatic Backup of Network devices Conf. FREE (Firewall, R & S) details inside
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26 0 0.0 1 apasillas
discussion login CLI Cisco MDS 9148 Multilayer
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9 0 0.0 1 apasillas
discussion Ping L2 switch from Router on different subnet
Last Reply 22 hours 14 min ago.
62 0 5 8 Richard Burts
discussion 6880 boot up message connor_hwrev_px
Last Reply 1 day 2 hours ago.
12 0 0.0 1 Aninda Chatterjee
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Subject Views Rating Comments Author
Catalyst 6800 VSS Quad-Sup SSO and Instant Access Overview - FAQ from live webcast
Last Reply 7 hours 48 min ago.
4487
5.0
2 ashirkar
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 6 days 15 hours ago.
7006
0.0
1 TCC_2
SNMP Engine over 80% CPU 100%!!! ?
Last Reply 1 week 14 hours ago.
4196
0.0
3 vita_user
CAM (Content Addressable Memory) VS TCAM (Ternary Content Addressable Memory)
Last Reply 1 week 2 days ago.
55314
4.5
6 Thamaraiselvam Santhanam
3850: Understanding interface configuration on NM modules
Last Reply 1 week 2 days ago.
15406
5.0
8 Richard Primm
Password Recovery on Cisco Catalyst 3850
Last Reply 1 week 2 days ago.
1795
0.0
2 Collin Clark
Cisco 2911 Stuck in ROMMON After CF Format
Last Reply 1 week 5 days ago.
67
0.0
2 Ty Gadberry
Route to Host Stuck on Switch
Last Reply 2 weeks 1 day ago.
2702
5.0
4 martinez-adrian
Single-sided vs double-sided vpc
Last Reply 3 weeks 1 day ago.
8703
3.7
15 pnagpal
EEM Script for collecting data during Intermittent High CPU issue
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6838
0.0
3 pnagpal
Troubleshooting Nexus 7000 - Useful commands
Last Reply 3 years 3 months ago.
3687
0.0
3 pnagpal
Cheat-sheet for Catalyst 6500 with Sup 720
Last Reply 3 years 5 months ago.
7009
0.0
2 pnagpal
Deep dive into EIGRP Summarization
Last Reply 3 years 8 months ago.
18
0.0
0 pnagpal
Routing Protocol Selection Guide - IGRP, EIGRP, OSPF, IS-IS, BGP
Last Reply 1 year 1 month ago.
96869
4.0
1 Shaun Hummel
Understanding MSFC, PFC and DFC roles in Catalyst 6500 Series Switch
Last Reply 4 weeks 1 day ago.
41028
5.0
12 SunilKhanna
Redundant-power-supply support on the Cisco Catalyst Express 500 Series switches
Last Reply 5 years 9 months ago.
396
0.0
0 TCC_2
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 1 month 2 weeks ago.
99872
4.7
47 ashirkar
example of Embedded Event Manager (EEM) on my 881W - to shut down a interface at 1am
Last Reply 1 month 2 weeks ago.
203
4.0
2 dshornstein
OSPF and IS-IS Differences
Last Reply 1 month 2 weeks ago.
3977
5.0
1 inderdeeps
Switch Fabric- Troubleshooting tips
Last Reply 3 years 4 months ago.
18549
5.0
2 pnagpal
The "%SW_DAI-4-DHCP_SNOOPING_DENY:" error message is received when configuring the dynamic ARP inspection in switches that run Cisco IOS Software
Last Reply 1 month 4 weeks ago.
22306
5.0
4 TCC_2
Troubleshooting tips for 3750X Stack power feature
Last Reply 2 months 1 day ago.
13505
4.0
5 pnagpal
ITD: Load Balancing, Traffic Steering & Clustering using Cisco switches
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58
5.0
0 expertadvisor20151
Configuring Microsoft NLB on Nexus 7000
Last Reply 2 months 3 days ago.
5171
5.0
2 mrabbi
Filter Results
Subject Views Rating Comments Author
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
Last Reply 2 months 3 days ago.
21839
4.6
12 jakula
blog License Activation on 4500
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179
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
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7036
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 8 months 2 weeks ago.
2105
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
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14475
5.0
3 ajaju
blog Loading an IOS on a switch via Xmodem
Last Reply 9 months 3 days ago.
38430
5.0
7 Aninda Chatterjee
blog Configuring a frame-relay switch
Last Reply 10 months 1 week ago.
5885
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blog Upcoming Ask the Expert Event Featuring Ahmad Manzoor - Senior Pre-Sales Engineer at AGCN
Last Reply 10 months 3 weeks ago.
370
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0 Francine Richards
blog Upcoming Ask the Expert Event with Cisco Designated VIP Marwan Al-shawi May 12-23
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123
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0 Francine Richards
blog Cisco WCCP with Bluecoat (Multicast mode)
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99
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0 vishal_2007
blog OSPF over IPsec Tunnel stucks in INIT state
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314
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0 hsticher
blog Pre-build SPT feature on Nexus - Benefits & Caveats
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1020
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0 srereddy
blog Link de-bounce timer operation when used on SFP+ ports on Nexus switches
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711
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2 srereddy
blog Flexlink in Cisco Layer 2 network
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83
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0 jakula
blog Output drops due to QoS on 2960/3560/3750 switches
Last Reply 3 years 11 months ago.
20843
5.0
0 Shashank Singh
blog Community Tech-Talk Series: Troubleshooting High CPU due to Multicast
Last Reply 1 year 10 months ago.
7934
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9 rucjain
blog Chalk Talk: The Secret to Successful QoS Deployments: A Well-Defined End-to-End QoS Strate
Last Reply 1 year 6 days ago.
272
0.0
0 Julie Burruss
blog Switch: How to test a cable status?
Last Reply 1 year 1 week ago.
5057
5.0
3 Anand G
blog Difference between N7K-M132XP -12 and N7K-M132XP -12L
Last Reply 1 year 3 months ago.
1514
0.0
1 ramugaju
blog About "TestErrorCounterMonitor" in 6500/7600
Last Reply 1 year 7 months ago.
1801
4.7
1 Anand G
blog Parity Error.
Last Reply 1 year 8 months ago.
2274
4.5
4 InayathUlla Sharieff
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