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 Catalyst 3850 with 2 fiber ports
Last Reply 30 min 10 sec ago.
0 0 0 2 tageorges
discussion Network designed issue
Last Reply 39 min 51 sec ago.
0 0 5 5 Jon Marshall
discussion Virtual Switch Stack connections to Edge Network
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7 0 0 1 Jon Marshall
discussion ASA 5505 Vlan question
Last Reply 57 min 45 sec ago.
5 0 0 1 Jon Marshall
discussion Need Help connecting Nexus 9K to 2K.
Last Reply 1 hour 25 min ago.
2 0 0 4 Jon Marshall
discussion C1921 vlan configuration problems
Last Reply 1 hour 44 min ago.
0 0 0 4 Jon Marshall
discussion hot add - n55 M16UP module in nx5548up
Last Reply 2 hours 8 min ago.
3405 1 0 3 brijesh.patel
discussion Access all traffic through Proxy Server, except SMPT and POP
Last Reply 2 hours 11 min ago.
0 0 0 4 Jon Marshall
discussion Cisco 800 router configuration
Last Reply 2 hours 53 min ago.
0 0 0 1 Philip D'Ath
discussion MAC Address not showing up in table
Last Reply 2 hours 54 min ago.
0 0 0 1 Philip D'Ath
discussion Cat4k Mgmt LoPri High cpu utilization WS-C4948
Last Reply 3 hours 9 min ago.
0 0 0 2 mark malone
discussion Unable to Ping from Native Vlan to an ip in another VLan
Last Reply 3 hours 17 min ago.
0 0 0 2 shaharshad
discussion Reset Cisco ME3600
Last Reply 3 hours 21 min ago.
0 0 5 2 mark malone
discussion DNS entry for configuration server gets cached or looked-up again?
Last Reply 3 hours 21 min ago.
0 0 0 1 Philip D'Ath
discussion high cpu multicast 3650
Last Reply 3 hours 32 min ago.
0 0 0 1 Philip D'Ath
discussion "%SYS-4-CHUNKSIBLINGSEXCEED:" on Catalyst 3650
Last Reply 3 hours 36 min ago.
0 0 0 2 bayhaki.a
discussion Server and Access ports
Last Reply 4 hours 12 min ago.
0 0 0 1 devils_advocate
discussion QSFP to 4x SFP cable (e.g. QSFP-4X10G-AC7M)
Last Reply 5 hours 8 min ago.
50 0 5 5 Iulian Vaideanu
discussion ASR 1001 - SPA issue
Last Reply 5 hours 8 min ago.
0 0 0 0 elijah.abbott1
discussion Problem with Port Channel on ASR920
Last Reply 6 hours 42 min ago.
0 0 0 1 Philip D'Ath
discussion Compatiblity between SFP-10G-LRM and SFP-10G-SR
Last Reply 6 hours 48 min ago.
0 0 0 1 Philip D'Ath
discussion Stratix 5700 Copper SFP
Last Reply 7 hours 45 min ago.
0 0 0 3 Richard Bradfield
discussion Nexus QSFP N55-MQ4 compatibile with QSFP-40G-SR-BD
Last Reply 8 hours 38 min ago.
69 0 5 9 will@bootit.com
discussion Unable to console Cisco 2960S-24PS-L, 15.0(2)SE2 (Low on memory, Try again later)
Last Reply 10 hours 13 min ago.
0 0 0 1 Philip D'Ath
discussion InterVLAN routing - Router or Switch as gateway Best practice
Last Reply 14 hours 25 min ago.
0 0 0 3 Jon Marshall
Filter Results
Subject Views Rating Comments Author
How to use Time-Domain Reflectometer (TDR)
Last Reply 1 hour 41 min ago.
91120
5.0
88 Leo Laohoo
Understanding SPAN,RSPAN,and ERSPAN
Last Reply 3 days 50 sec ago.
59686
4.8
7 ashirkar
Using 3850 Embedded Wireshark (Wired)
Last Reply 3 days 7 hours ago.
39589
5.0
3 Colby Beam
Understanding MSFC, PFC and DFC roles in Catalyst 6500 Series Switch
Last Reply 1 week 1 day ago.
56672
5.0
14 SunilKhanna
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 1 week 2 days ago.
307391
5.0
43 plumbis
3850 switch - IOS XE upgrade Detailed (standalone)
Last Reply 1 week 6 days ago.
10772
5.0
7 Furose Khan Mohammed Ali
IPV6 on the Cisco 877
Last Reply 2 weeks 3 days ago.
34769
5.0
0 Andrew Judson
QUICK TIPS: Installing Multiple Cisco Switches - Video
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5
0.0
0 tfortunato
Error Message:%ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface <interface> Power Controller reports power Imax error detected
Last Reply 1 month 17 hours ago.
15672
5.0
5 Sivagami Narayanan
DHCP Static Binding on Cisco IOS
Last Reply 1 month 4 days ago.
23
0.0
0 indrapalccna
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 1 month 4 days ago.
50296
4.7
60 ashirkar
OSPF and IS-IS Differences
Last Reply 1 month 1 week ago.
7001
5.0
3 inderdeeps
34 Things about OSPF
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36
0.0
0 inderdeeps
Nexus - vPC Recommendations
Last Reply 1 month 2 weeks ago.
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
Last Reply 2 months 2 weeks ago.
2499
0.0
2 TCC_2
What is the difference between an IP base image and an IP services image
Last Reply 2 months 2 weeks ago.
202973
5.0
10 tahirshabbir
How to configure a Cisco Catalyst Express 500 series switch
Last Reply 3 months 3 days ago.
18435
5.0
3 TCC_2
Routing Protocol Selection Guide - IGRP, EIGRP, OSPF, IS-IS, BGP
Last Reply 3 months 1 week ago.
156545
4.0
2 Shaun Hummel
3850: Understanding interface configuration on NM modules
Last Reply 3 months 3 weeks ago.
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
5.0
11 Aninda Chatterjee
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
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20
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0 marobbs
blog Who Should Attend The Kickoff Meeting?
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43
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blog Network Optimization: The 90-Day Plan
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54
0.0
0 marobbs
blog Prepare for the Collector
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34
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blog Expert Insights: Network Optimization
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55
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0 marobbs
blog Network Compliance Analysis
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43
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45
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blog Nexus 7000 ACL logging (OAL)
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18677
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8 Robert Taylor
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214
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0 Ganesh Hariharan
blog Output drops due to QoS on 2960/3560/3750 switches
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28606
5.0
1 Shashank Singh
blog License Activation on 4500
Last Reply 1 year 3 months ago.
788
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blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 1 year 4 months ago.
7704
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
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2922
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
Last Reply 1 year 6 months ago.
22406
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3 ajaju
blog Configuring a frame-relay switch
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7877
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7 Aninda Chatterjee
blog Upcoming Ask the Expert Event Featuring Ahmad Manzoor - Senior Pre-Sales Engineer at AGCN
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386
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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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139
0.0
0 Francine Richards
blog Cisco WCCP with Bluecoat (Multicast mode)
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138
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0 vishal_2007
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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1564
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0 srereddy
blog Link de-bounce timer operation when used on SFP+ ports on Nexus switches
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778
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blog Flexlink in Cisco Layer 2 network
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9 Ruchir Jain
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