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
Filter Results
Subject Views Votes Rating Replies Last replied by
discussion Problem with Port Channel on ASR920
Last Reply 28 sec ago.
0 0 0 0 jorge vinueza
discussion Nexus QSFP N55-MQ4 compatibile with QSFP-40G-SR-BD
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69 0 5 9 will@bootit.com
discussion Network designed issue
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0 0 5 4 opnineopnine
discussion Unable to console Cisco 2960S-24PS-L, 15.0(2)SE2 (Low on memory, Try again later)
Last Reply 1 hour 46 min ago.
0 0 0 1 Philip D'Ath
discussion InterVLAN routing - Router or Switch as gateway Best practice
Last Reply 5 hours 59 min ago.
0 0 0 3 Jon Marshall
discussion (Undefined error) message --> scp:/ flash:/ ASR1004 Solarwinds
Last Reply 7 hours 27 min ago.
0 0 0 0 PACOM-Imperial
discussion DNS entry for configuration server gets cached or looked-up again?
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0 0 0 0 aeisenac
discussion Stratix 5700 Copper SFP
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0 0 0 2 petkos@mosebach.com
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8 0 0 1 Ganesh Hariharan
discussion Interesting Mac Address Flap issue
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0 0 3 3 Ganesh Hariharan
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0 0 0 1 verma_amit1
discussion Access all traffic through Proxy Server, except SMPT and POP
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0 0 0 2 Ganesh Hariharan
discussion SG220 Series "Input Errors" on interfaces
Last Reply 10 hours 56 min ago.
0 0 0 0 pmcallion
discussion QSFP to 4x SFP cable (e.g. QSFP-4X10G-AC7M)
Last Reply 10 hours 56 min ago.
50 0 5 7 Iulian Vaideanu
discussion Stacking issues between
Last Reply 12 hours 20 min ago.
0 0 0 4 Joseph W. Doherty
discussion Static Route through VPN
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42 0 5 9 Karsten Iwen
discussion Multicast routing on C2960XR
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0 0 0 5 triton.milossedlacek
discussion Nexus 5k Scheduled Reload
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3119 6 0 9 Clinton Neill
discussion checking my certification status
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0 0 0 1 Marvin Rhoads
discussion DHCP Snooping and Duplicate Address Messages From Clients
Last Reply 14 hours 15 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 14 hours 32 min ago.
0 0 4 3 pwwiddicombe
discussion strange port utilization
Last Reply 14 hours 37 min ago.
9 0 0 2 pwwiddicombe
discussion Switch reboot continuously
Last Reply 15 hours 44 min ago.
30 0 0 5 rebichada1
discussion POE Switches vs Non POE Devices
Last Reply 17 hours 47 min ago.
62 1 0 1 peterpickem
discussion Cisco Nexus 9372TX Switch
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31 0 5 7 dukenuk96
Filter Results
Subject Views Rating Comments Author
How to use Time-Domain Reflectometer (TDR)
Last Reply 5 min 53 sec ago.
91120
5.0
85 Leo Laohoo
Understanding SPAN,RSPAN,and ERSPAN
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59686
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7 ashirkar
Using 3850 Embedded Wireshark (Wired)
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39589
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3 Colby Beam
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Last Reply 1 week 1 day ago.
56672
5.0
14 SunilKhanna
Understanding Ethernet Virtual Circuits (EVC)
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307391
5.0
43 plumbis
3850 switch - IOS XE upgrade Detailed (standalone)
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7 Furose Khan Mohammed Ali
IPV6 on the Cisco 877
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34769
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0 Andrew Judson
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5
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Error Message:%ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface <interface> Power Controller reports power Imax error detected
Last Reply 1 month 10 hours ago.
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5 Sivagami Narayanan
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23
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50296
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OSPF and IS-IS Differences
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7001
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3 inderdeeps
34 Things about OSPF
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36
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Nexus - vPC Recommendations
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25582
5.0
4 pnagpal
The Cisco Discovery Protocol displays the "%CDP-4-DUPLEX_MISMATCH" error message on Catalyst fixed configuration switches running IOS software.
Last Reply 1 month 3 weeks ago.
19403
5.0
1 TCC_2
The "%Error formatting slot0 (Can not find flash algorithm)" error message is displayed during an attempt to format the ATA flash card in Cisco Catalyst 6000/6500 series switches
Last Reply 1 month 4 weeks ago.
2552
5.0
1 TCC_2
4500X-32 IOS upgrade procedure
Last Reply 2 months 2 days ago.
36
0.0
0 butturwa
How to Form a Catalyst 3850 Data-Stack and Power-Stack
Last Reply 2 months 1 week ago.
1115
5.0
2 Luis Villanueva Brito
How to configure Ether Switch Modules connected to a router
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2499
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2 TCC_2
What is the difference between an IP base image and an IP services image
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202973
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10 tahirshabbir
How to configure a Cisco Catalyst Express 500 series switch
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18435
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Routing Protocol Selection Guide - IGRP, EIGRP, OSPF, IS-IS, BGP
Last Reply 3 months 1 week ago.
156545
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2 Shaun Hummel
3850: Understanding interface configuration on NM modules
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33858
5.0
12 Richard Primm
I am receiving some error like broadcast and input error please see detail, Is it normal ?
Last Reply 4 months 1 week ago.
51
0.0
1 junaidmumtazcisco
SSH version 2 no IOS cat4000-i5s-mz.122-25.EWA14.bin
Last Reply 4 months 3 weeks ago.
54
0.0
2 Sergio Alvares
Filter Results
Subjectsort ascending Views Rating Comments Author
blog Loading an IOS on a switch via Xmodem
Last Reply 4 weeks 1 day ago.
66405
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11 Aninda Chatterjee
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
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54
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18677
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28606
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7704
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blog How to build the topology of an OSPF area
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blog Configuring a frame-relay switch
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0 Francine Richards
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blog Cisco WCCP with Bluecoat (Multicast mode)
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blog OSPF over IPsec Tunnel stucks in INIT state
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blog Pre-build SPT feature on Nexus - Benefits & Caveats
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