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
Filter Results
Subject Views Votes Rating Replies Last replied by
discussion Error Loading Flash...
Last Reply 1 min 16 sec ago.
6 0 0 3 canerkoksal
discussion 3850-48XS - Dot1x - Port not switching to Isolated LAN during reboot
Last Reply 22 min 34 sec ago.
6 0 5 2 michaelpadkins@...
discussion Mixed/Overlapping VLSM for OSPF
Last Reply 2 hours 43 min ago.
6 0 0 1 Rolf Fischer
discussion UDP ports blocked on Catalyst 2950
Last Reply 4 hours 34 min ago.
4 0 0 1 Peter Paluch
discussion ASR1002: Firmware and IOS compatibility
Last Reply 4 hours 42 min ago.
2 0 0 1 Iulian Vaideanu
discussion Command Conversion From Cisco 7200 Series to ASR 1000 Series
Last Reply 5 hours 8 min ago.
0 0 0 0 bayhaki.a
discussion Annoying layer 2 broadcasting!
Last Reply 5 hours 17 min ago.
19 0 0 0 coffee_monkey
discussion strange port utilization
Last Reply 5 hours 50 min ago.
19 0 0 4 asdasdas asdasdas
discussion Data Center Top of Rack Switch Suggestions
Last Reply 13 hours 27 min ago.
22 0 5 2 Leo Laohoo
discussion Catalyst 3850 with 2 fiber ports
Last Reply 13 hours 28 min ago.
28 0 0 7 Leo Laohoo
discussion NBAR discovery on 3850???
Last Reply 14 hours 26 min ago.
9 0 0 3 luis.rosello
discussion Unable to Ping from Native Vlan to an ip in another VLan
Last Reply 14 hours 43 min ago.
33 0 0 4 shaharshad
discussion Can't ping through SVI
Last Reply 16 hours 2 min ago.
16 0 0 3 Peter Paluch
discussion Interface range command for clear counter
Last Reply 17 hours 45 min ago.
10 0 0 3 Jon Marshall
discussion MAC Address not showing up in table
Last Reply 20 hours 8 min ago.
21 0 0 2 Larry Bernard
discussion Problem with Port Channel on ASR920
Last Reply 21 hours 32 min ago.
88 0 0 7 mark malone
discussion Cat4k Mgmt LoPri High cpu utilization WS-C4948
Last Reply 22 hours 6 min ago.
37 0 0 3 Iulian Vaideanu
discussion 3750-X not recognizes in 3750G STACK
Last Reply 22 hours 8 min ago.
61 0 0 4 julien.kolle
discussion Topologie Spanning Tree change from StackPort1
Last Reply 22 hours 32 min ago.
5093 0 2.9 7 John Rumball
discussion ASA 5505 Vlan question
Last Reply 22 hours 32 min ago.
21 0 0 2 Richard Burts
discussion (Undefined error) message --> scp:/ flash:/ ASR1004 Solarwinds
Last Reply 23 hours 1 min ago.
7 0 0 1 mark malone
discussion SG220 Series "Input Errors" on interfaces
Last Reply 23 hours 22 min ago.
14 0 0 1 mark malone
discussion Nexus 7000 with fex and server with 2 nics
Last Reply 23 hours 36 min ago.
28 0 5 2 fsebera
discussion Server and Access ports
Last Reply 23 hours 42 min ago.
16 0 5 2 mark malone
discussion Stratix 5700 Copper SFP
Last Reply 1 day 3 min ago.
15 0 0 4 petkos@mosebach.com
Filter Results
Subject Views Rating Comments Author
How to use Time-Domain Reflectometer (TDR)
Last Reply 1 day 4 min ago.
91830
5.0
88 Leo Laohoo
Understanding SPAN,RSPAN,and ERSPAN
Last Reply 3 days 22 hours ago.
60407
4.8
7 ashirkar
Using 3850 Embedded Wireshark (Wired)
Last Reply 4 days 5 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 5 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 5 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
Last Reply 1 month 4 days ago.
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 19 hours 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 1 week 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 11 hours ago.
66563
5.0
11 Aninda Chatterjee
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
Last Reply 2 months 1 week ago.
25193
4.7
13 Akula Jyoti Lakshmi
blog Collector Security
Last Reply 3 months 4 days ago.
20
0.0
0 marobbs
blog Who Should Attend The Kickoff Meeting?
Last Reply 3 months 1 week ago.
44
0.0
0 marobbs
blog Network Optimization: The 90-Day Plan
Last Reply 3 months 2 weeks ago.
55
0.0
0 marobbs
blog Prepare for the Collector
Last Reply 4 months 3 hours ago.
34
0.0
0 marobbs
blog Expert Insights: Network Optimization
Last Reply 4 months 6 days ago.
55
0.0
0 marobbs
blog Network Compliance Analysis
Last Reply 4 months 6 days ago.
43
0.0
0 marobbs
blog Three Tips for a Successful Review Period
Last Reply 4 months 6 days ago.
45
0.0
0 marobbs
blog Nexus 7000 ACL logging (OAL)
Last Reply 4 months 1 week ago.
18690
5.0
8 Robert Taylor
blog Active /Active Internet Load balancing with High availability ( AS Prepend Path)
Last Reply 4 months 2 weeks ago.
214
5.0
0 Ganesh Hariharan
blog Output drops due to QoS on 2960/3560/3750 switches
Last Reply 7 months 2 weeks ago.
28627
5.0
1 Shashank Singh
blog License Activation on 4500
Last Reply 1 year 3 months ago.
788
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 1 year 4 months ago.
7708
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 1 year 7 months ago.
2922
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
Last Reply 1 year 7 months ago.
22420
5.0
3 ajaju
blog Configuring a frame-relay switch
Last Reply 1 year 9 months ago.
7888
5.0
7 Aninda Chatterjee
blog Upcoming Ask the Expert Event Featuring Ahmad Manzoor - Senior Pre-Sales Engineer at AGCN
Last Reply 1 year 9 months ago.
386
5.0
0 Francine Richards
blog Upcoming Ask the Expert Event with Cisco Designated VIP Marwan Al-shawi May 12-23
Last Reply 1 year 9 months ago.
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.
492
5.0
0 hsticher
blog Pre-build SPT feature on Nexus - Benefits & Caveats
Last Reply 1 year 10 months ago.
1567
5.0
0 srereddy
blog Link de-bounce timer operation when used on SFP+ ports on Nexus switches
Last Reply 1 year 10 months ago.
778
5.0
2 srereddy
blog Flexlink in Cisco Layer 2 network
Last Reply 1 year 10 months ago.
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.
8769
5.0
9 Ruchir Jain
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