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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Get a "%Error opening scp://*@server_address//ios_file_name (Undefined error)", when trying to scp from SFTP_Root on Solarwinds server to ASR1004.I...
17 hours 30 min ago
I'm using storm control as a work-around for a bug in Apple Thunderbolt displays that periodically floods the network with bogus traffic.  The swit...
1 day 17 hours ago
For the 9508 chassis:- IF i add two modules N9K-X9564TX with 4 fabric ,There is any blocking in the line card or not ? i need to know also how to...
1 day 23 hours ago
Hi, I tried to go through the Cisco document but I got confused whether ASR 1002 will support ISSU or not. Please provide exact steps to upgrade wi...
2 days 14 hours ago
Greetings friends, Does anyone have some basic troubleshooting skills for troubleshooting a video stream from one switch to another.  I have about...
2 days 15 hours 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 Which standard do you follow to draw a network topology?
Last Reply 3 min 49 sec ago.
0 0 0 1 Karsten Iwen
discussion What's the best Cisco Firewall for 12 PCs, 2 servers and hosted VOIP
Last Reply 17 min 20 sec ago.
0 0 0 1 Karsten Iwen
discussion Invalid ARP
Last Reply 38 min 13 sec ago.
14 0 0 4 eXPlosion
discussion Which has more throughput Cisco UC540 or Cisco 891?
Last Reply 1 hour 9 min ago.
0 0 0 0 jaydensanders
discussion Switch 3750x fail to boot after upgrade
Last Reply 1 hour 16 min ago.
4 0 0 1 Leo Laohoo
discussion Cisco 2951 with EHWIC
Last Reply 2 hours 29 min ago.
27 0 0 4 blhoskins
discussion How to configure ADSL PPPoE conexion withount interface ATM on the cisco 1941 router
Last Reply 4 hours 24 min ago.
6 0 0 0 aefmaaradji84
discussion DHCP not reachable over fiber link to access switches
Last Reply 4 hours 24 min ago.
0 0 0 0 night-fury
discussion need simple config for 3560 to act as plain old switch
Last Reply 5 hours 22 min ago.
4 0 0 2 josh000014
discussion SUP720 back to RP rommon mode after booting completely
Last Reply 6 hours 26 min ago.
51 0 5 7 Hele Du
discussion Nexus 7000 with fex and server with 2 nics
Last Reply 7 hours 46 min ago.
28 0 5 3 Masoud Pourshabanian
discussion ASR 9K + VXLAN
Last Reply 16 hours 12 min ago.
0 0 0 0 magedis0383
discussion Annoying layer 2 broadcasting!
Last Reply 18 hours 15 min ago.
19 0 0 1 mark malone
discussion Error Loading Flash...
Last Reply 19 hours 20 min ago.
17 0 5 3 canerkoksal
discussion 3850-48XS - Dot1x - Port not switching to Isolated LAN during reboot
Last Reply 19 hours 41 min ago.
6 0 5 2 michaelpadkins@...
discussion Mixed/Overlapping VLSM for OSPF
Last Reply 22 hours 2 min ago.
6 0 0 1 Rolf Fischer
discussion UDP ports blocked on Catalyst 2950
Last Reply 23 hours 53 min ago.
4 0 0 1 Peter Paluch
discussion ASR1002: Firmware and IOS compatibility
Last Reply 1 day 1 min ago.
2 0 0 1 Iulian Vaideanu
discussion Command Conversion From Cisco 7200 Series to ASR 1000 Series
Last Reply 1 day 27 min ago.
0 0 0 0 bayhaki.a
discussion strange port utilization
Last Reply 1 day 1 hour ago.
19 0 0 4 asdasdas asdasdas
discussion Data Center Top of Rack Switch Suggestions
Last Reply 1 day 8 hours ago.
22 0 5 2 Leo Laohoo
discussion Catalyst 3850 with 2 fiber ports
Last Reply 1 day 8 hours ago.
28 0 0 7 Leo Laohoo
discussion NBAR discovery on 3850???
Last Reply 1 day 9 hours ago.
9 0 0 3 luis.rosello
discussion Unable to Ping from Native Vlan to an ip in another VLan
Last Reply 1 day 10 hours ago.
33 0 0 4 shaharshad
discussion Can't ping through SVI
Last Reply 1 day 11 hours ago.
16 0 0 3 Peter Paluch
Filter Results
Subject Views Rating Comments Author
How to use Time-Domain Reflectometer (TDR)
Last Reply 1 day 7 hours ago.
91830
5.0
88 Leo Laohoo
Understanding SPAN,RSPAN,and ERSPAN
Last Reply 4 days 5 hours ago.
60407
4.8
7 ashirkar
Using 3850 Embedded Wireshark (Wired)
Last Reply 4 days 12 hours ago.
39720
5.0
3 Colby Beam
Understanding MSFC, PFC and DFC roles in Catalyst 6500 Series Switch
Last Reply 1 week 2 days ago.
56976
5.0
14 SunilKhanna
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 1 week 3 days ago.
307911
5.0
43 plumbis
3850 switch - IOS XE upgrade Detailed (standalone)
Last Reply 2 weeks 12 hours ago.
10772
5.0
7 Furose Khan Mohammed Ali
IPV6 on the Cisco 877
Last Reply 2 weeks 4 days ago.
34774
5.0
0 Andrew Judson
QUICK TIPS: Installing Multiple Cisco Switches - Video
Last Reply 3 weeks 6 days ago.
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 1 day ago.
15746
5.0
5 Sivagami Narayanan
DHCP Static Binding on Cisco IOS
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26
0.0
0 indrapalccna
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 1 month 5 days ago.
50296
4.7
60 ashirkar
OSPF and IS-IS Differences
Last Reply 1 month 2 weeks ago.
7121
5.0
3 inderdeeps
34 Things about OSPF
Last Reply 1 month 2 weeks ago.
44
0.0
0 inderdeeps
Nexus - vPC Recommendations
Last Reply 1 month 2 weeks ago.
25813
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 4 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 2 months 1 day ago.
2555
5.0
1 TCC_2
4500X-32 IOS upgrade procedure
Last Reply 2 months 3 days ago.
39
0.0
0 butturwa
How to Form a Catalyst 3850 Data-Stack and Power-Stack
Last Reply 2 months 2 weeks ago.
1181
5.0
2 Luis Villanueva Brito
How to configure Ether Switch Modules connected to a router
Last Reply 2 months 2 weeks ago.
2517
0.0
2 TCC_2
What is the difference between an IP base image and an IP services image
Last Reply 2 months 3 weeks ago.
203807
5.0
10 tahirshabbir
How to configure a Cisco Catalyst Express 500 series switch
Last Reply 3 months 4 days ago.
18503
5.0
3 TCC_2
Routing Protocol Selection Guide - IGRP, EIGRP, OSPF, IS-IS, BGP
Last Reply 3 months 2 weeks ago.
158488
4.0
2 Shaun Hummel
3850: Understanding interface configuration on NM modules
Last Reply 3 months 3 weeks ago.
34380
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.
52
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
Subject Views Rating Comments Author
blog Loading an IOS on a switch via Xmodem
Last Reply 1 month 1 day ago.
66690
5.0
11 Aninda Chatterjee
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
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0 marobbs
blog Who Should Attend The Kickoff Meeting?
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0.0
0 marobbs
blog Network Optimization: The 90-Day Plan
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55
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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
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43
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0 marobbs
blog Three Tips for a Successful Review Period
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45
0.0
0 marobbs
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18711
5.0
8 Robert Taylor
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213
5.0
0 Ganesh Hariharan
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28645
5.0
1 Shashank Singh
blog License Activation on 4500
Last Reply 1 year 4 months ago.
798
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 1 year 4 months ago.
7710
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 1 year 7 months ago.
2924
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
Last Reply 1 year 7 months ago.
22457
5.0
3 ajaju
blog Configuring a frame-relay switch
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7897
5.0
7 Aninda Chatterjee
blog Upcoming Ask the Expert Event Featuring Ahmad Manzoor - Senior Pre-Sales Engineer at AGCN
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389
5.0
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)
Last Reply 1 year 9 months ago.
138
0.0
0 vishal_2007
blog OSPF over IPsec Tunnel stucks in INIT state
Last Reply 1 year 10 months ago.
493
5.0
0 hsticher
blog Pre-build SPT feature on Nexus - Benefits & Caveats
Last Reply 1 year 10 months ago.
1571
5.0
0 srereddy
blog Link de-bounce timer operation when used on SFP+ ports on Nexus switches
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778
5.0
2 srereddy
blog Flexlink in Cisco Layer 2 network
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181
5.0
0 Akula Jyoti Lakshmi
blog Community Tech-Talk Series: Troubleshooting High CPU due to Multicast
Last Reply 1 year 10 months ago.
8771
5.0
9 Ruchir Jain
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