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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Ive installed two stacked Catalyst 3850s. Connected to these two switches I have a SAN 6210 Equallogic Dell ESX .The interfaces on the switches  is...
by killroy
13 min 51 sec ago
Hi All! I can't solve one problem with external default route in the standard OSPF area. I have three OSPF-routers: R1, R2, R4. R1 knows the defaul...
23 min 22 sec ago
Hi  I have just added a new IOS to the flash on the asr1002x router. I then tried the command "boot system flash xxxxxxxx" it registers the command...
1 hour 22 min ago
Hi all,On my two Cisco 3020 switches (please see attached pic) I see many syslog messages:%SW_MATM-4-MACFLAP_NOTIF: Host MAC_ADDRESS_OF_SW3 in vlan...
1 hour 24 min ago
Hello all,We had problems with voice quality recently. The issue was with local calls between analog and IP phone or between analog phones (each co...
2 hours 21 min ago
         
IP SLA 325 3 0 0 0
Routers 2 0 0 0 0
Switches 6738 569 6 1 0
Filter Results
Subject Views Votes Rating Replies Last replied by
discussion Design help
Last Reply 3 min 16 sec ago.
7 0 0.0 4 sridhar ch
discussion OSPF External E2 Default Route Is Missed
Last Reply 23 min 22 sec ago.
0 0 0.0 0 Konstantin Vino...
discussion Problem Cisco Catalyst 3850 input errors
Last Reply 13 min 51 sec ago.
0 0 0.0 0 killroy
discussion ACL not working on 3750 Switch Stack on a trunk port
Last Reply 1 hour 21 min ago.
28 0 0.0 2 jonasvanraes1
discussion ASR 1002X Firmware Upgrade
Last Reply 1 hour 22 min ago.
0 0 0.0 0 Mokhalil82
discussion MAC address flapping between Cisco 3020 switch ports
Last Reply 1 hour 24 min ago.
0 0 0.0 0 Harutyun Hakobyan
discussion Adding Links to VRF
Last Reply 1 hour 25 min ago.
11 0 5 2 Mokhalil82
discussion Unable to ping Server ip address located in other location
Last Reply 1 hour 31 min ago.
12 0 0.0 2 sunilsu45
discussion Embedded Packet Capture Feature on IOS
Last Reply 1 hour 35 min ago.
15 0 5 3 Vasilii Mikhail...
discussion ACL outbound not allowed
Last Reply 1 hour 55 min ago.
55 0 0.0 6 jonasvanraes1
discussion Port Numbering for 4500-X with 8 ports uplink module
Last Reply 2 hours 8 min ago.
6 0 0.0 1 InayathUlla Sharieff
discussion WS-C6509-E, SUP2T, Microflow Policing drops not visible
Last Reply 2 hours 21 min ago.
0 0 0.0 0 CSCO11916418
discussion 2960s IOS Upgrade Issue
Last Reply 3 hours 3 min ago.
37 0 0.0 5 federico.marassi
discussion 2960X doesn't Support RSPAN?
Last Reply 3 hours 24 min ago.
35 0 0.0 13 kelvinffhan
discussion Packet loss when pinging from/to a cisco 3560e switch
Last Reply 3 hours 35 min ago.
44 0 2.5 23 veerareddy.dubbaka1
discussion Cisco catalyst 4500e rebooted unexpectedly
Last Reply 4 hours 18 min ago.
0 0 0.0 0 m_ashok89
discussion C4K Parity error message
Last Reply 4 hours 58 min ago.
1 0 0.0 1 Madhukrishnan G...
discussion Virtual IP for two redundant PCs in Cisco Switch
Last Reply 5 hours 27 min ago.
11 0 0.0 2 lakshmanarao.v
discussion CANT PING HQ ROUTER!
Last Reply 16 hours 35 min ago.
55 0 0.0 2 Jon Marshall
discussion Vlan question
Last Reply 6 hours 41 min ago.
2 0 0.0 1 Reza Sharifi
discussion help with multiple nat translation on a Cisco Nexus 3548
Last Reply 9 hours 17 min ago.
34 1 0.0 8 les.k.stott
discussion Internet Gateway using OSPF Issue
Last Reply 9 hours 21 min ago.
4 0 0.0 2 oslopez
discussion Nexus 56K and FEX 2232TM - connect a router to the FEX?
Last Reply 11 hours 11 min ago.
11 0 0.0 3 Reza Sharifi
discussion Changing the SUP720 on WS-C6506-E from slot 5 to slot 6
Last Reply 11 hours 38 min ago.
5 0 0.0 1 Jon Marshall
discussion New router, one server unable to access outside.
Last Reply 12 hours 10 min ago.
1 0 0.0 1 sampson01
Filter Results
Subject Views Rating Comments Author
Telnet session to FWSM module disconnects due to MTU size issues in 6500 or 7600 switches
Last Reply 5 years 9 months ago.
1405
0.0
0 TCC_2
X2-10GB-LRM vs X2-10GB-SR compatability
Last Reply 25 min 35 sec ago.
1334
0.0
9 yogesh rajguru
Fortify Your LAN with Cisco Catalyst Switching - FAQ from live webcast
Last Reply 11 months 4 weeks ago.
134
5.0
0 Anim Saxena
QoS marking based on the “trust dscp” IOS CLI command
Last Reply 1 day 21 hours ago.
5
0.0
0 ben.epskamp
Catalyst 6800 VSS Quad-Sup SSO and Instant Access Overview - FAQ from live webcast
Last Reply 5 days 13 hours ago.
4538
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 1 week 4 days ago.
7018
0.0
1 TCC_2
SNMP Engine over 80% CPU 100%!!! ?
Last Reply 1 week 5 days ago.
4201
0.0
3 vita_user
CAM (Content Addressable Memory) VS TCAM (Ternary Content Addressable Memory)
Last Reply 2 weeks 10 hours ago.
43230
4.5
6 Thamaraiselvam Santhanam
3850: Understanding interface configuration on NM modules
Last Reply 2 weeks 12 hours ago.
15709
5.0
8 Richard Primm
Password Recovery on Cisco Catalyst 3850
Last Reply 2 weeks 1 day ago.
1815
0.0
2 Collin Clark
Cisco 2911 Stuck in ROMMON After CF Format
Last Reply 2 weeks 3 days ago.
71
0.0
2 Ty Gadberry
Route to Host Stuck on Switch
Last Reply 3 weeks 4 hours ago.
2706
5.0
4 martinez-adrian
Single-sided vs double-sided vpc
Last Reply 3 weeks 6 days ago.
8882
3.7
15 pnagpal
EEM Script for collecting data during Intermittent High CPU issue
Last Reply 2 years 6 months ago.
6944
0.0
3 pnagpal
Troubleshooting Nexus 7000 - Useful commands
Last Reply 3 years 3 months ago.
3690
0.0
3 pnagpal
Cheat-sheet for Catalyst 6500 with Sup 720
Last Reply 3 years 5 months ago.
7043
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.
98261
4.0
1 Shaun Hummel
Understanding MSFC, PFC and DFC roles in Catalyst 6500 Series Switch
Last Reply 1 month 4 days ago.
41237
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 3 weeks ago.
101264
4.7
47 ashirkar
example of Embedded Event Manager (EEM) on my 881W - to shut down a interface at 1am
Last Reply 1 month 3 weeks ago.
203
4.0
2 dshornstein
OSPF and IS-IS Differences
Last Reply 1 month 3 weeks ago.
3998
5.0
1 inderdeeps
Switch Fabric- Troubleshooting tips
Last Reply 3 years 4 months ago.
18600
5.0
2 pnagpal
Filter Results
Subject Views Rating Comments Author
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
Last Reply 2 months 1 week ago.
17174
4.6
12 jakula
blog License Activation on 4500
Last Reply 5 months 2 weeks ago.
179
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 5 months 2 weeks ago.
7038
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 8 months 2 weeks ago.
2206
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
Last Reply 8 months 2 weeks ago.
15585
5.0
3 ajaju
blog Loading an IOS on a switch via Xmodem
Last Reply 9 months 1 week ago.
38731
5.0
7 Aninda Chatterjee
blog Configuring a frame-relay switch
Last Reply 10 months 2 weeks ago.
5895
5.0
7 Aninda Chatterjee
blog Upcoming Ask the Expert Event Featuring Ahmad Manzoor - Senior Pre-Sales Engineer at AGCN
Last Reply 10 months 3 weeks ago.
383
5.0
0 Francine Richards
blog Upcoming Ask the Expert Event with Cisco Designated VIP Marwan Al-shawi May 12-23
Last Reply 10 months 3 weeks ago.
123
0.0
0 Francine Richards
blog Cisco WCCP with Bluecoat (Multicast mode)
Last Reply 11 months 6 days ago.
99
0.0
0 vishal_2007
blog OSPF over IPsec Tunnel stucks in INIT state
Last Reply 11 months 2 weeks ago.
314
5.0
0 hsticher
blog Pre-build SPT feature on Nexus - Benefits & Caveats
Last Reply 2 years 10 months ago.
1322
5.0
0 srereddy
blog Link de-bounce timer operation when used on SFP+ ports on Nexus switches
Last Reply 2 years 10 months ago.
741
5.0
2 srereddy
blog Flexlink in Cisco Layer 2 network
Last Reply 2 years 1 month ago.
82
5.0
0 jakula
blog Output drops due to QoS on 2960/3560/3750 switches
Last Reply 3 years 11 months ago.
24316
5.0
0 Shashank Singh
blog Community Tech-Talk Series: Troubleshooting High CPU due to Multicast
Last Reply 1 year 10 months ago.
7879
5.0
9 rucjain
blog Chalk Talk: The Secret to Successful QoS Deployments: A Well-Defined End-to-End QoS Strate
Last Reply 1 year 1 week ago.
272
0.0
0 Julie Burruss
blog Switch: How to test a cable status?
Last Reply 1 year 1 week ago.
5080
5.0
3 Anand G
blog Difference between N7K-M132XP -12 and N7K-M132XP -12L
Last Reply 1 year 3 months ago.
1540
0.0
1 ramugaju
blog About "TestErrorCounterMonitor" in 6500/7600
Last Reply 1 year 7 months ago.
1805
4.7
1 Anand G
blog Parity Error.
Last Reply 1 year 8 months ago.
2275
4.5
4 InayathUlla Sharieff
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