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 Nexus 3000 Automating config backups with FTP Password
Last Reply 35 min 12 sec ago.
11 0 0 1 Ganesh Hariharan
discussion Prefix List for all Private Networks
Last Reply 45 min 25 sec ago.
38 0 0 2 Ganesh Hariharan
discussion To modify Duplex and Speed manually under trunk interface
Last Reply 57 min 8 sec ago.
11 0 0 2 Ganesh Hariharan
discussion Cisco-Meraki Core Switch
Last Reply 1 hour 2 min ago.
22 0 0 2 Ganesh Hariharan
discussion Cisco 6503's trunk interfaces prune VLANs
Last Reply 1 hour 11 min ago.
12 0 0 4 Ganesh Hariharan
discussion QoS
Last Reply 2 hours 37 min ago.
10 0 0 2 Joseph W. Doherty
discussion IOS update error
Last Reply 6 hours 28 sec ago.
21 0 0 3 jjohnston1127
discussion show log onboard
Last Reply 6 hours 2 min ago.
10 0 0 1 Leo Laohoo
discussion Redundant Core switches and Single Router Design
Last Reply 9 hours 11 min ago.
1220 0 4.5 18 ahmed-531
discussion 6500 SUP720 upgrade problem
Last Reply 9 hours 16 min ago.
66 0 0 9 amikat
discussion why we need IPv6 solicited multicast address ??
Last Reply 9 hours 30 min ago.
34 0 0 2 Peter Paluch
discussion missing mac address-table info?
Last Reply 9 hours 36 min ago.
669 0 0 10 dbergman13
discussion Will a Nexus 7K Switch Pass Traffic on a Trunk to Adjoining Switch
Last Reply 10 hours 17 min ago.
6 0 0 2 jeff6strings
discussion C2960X Gigaport Switch
Last Reply 10 hours 42 min ago.
21 0 0 4 Philip D'Ath
discussion 2960X in Rommon will not recognize usbflash0
Last Reply 10 hours 57 min ago.
15 0 0 2 Philip D'Ath
discussion WS-CBS3020-HPQ Ping lose
Last Reply 11 hours 30 min ago.
11 0 0 2 johan oosterwaal
discussion DFC Card showing incorrect Adjacencies on Catalyst 6509
Last Reply 12 hours 42 min ago.
12 0 0 1 Jon Marshall
discussion TACACS
Last Reply 12 hours 58 min ago.
12 0 5 2 Jon Marshall
discussion VLAN removed prior to moving ports to another VLAN, shutdown? how to check ?
Last Reply 13 hours 26 min ago.
28 0 0 5 Madhukrishnan G...
discussion Using /31 subnet mask - Can I use .0?
Last Reply 13 hours 56 min ago.
61 0 5 7 Karsten Iwen
discussion about "srr-queue bandwidth limit XX"
Last Reply 14 hours 39 min ago.
38 0 0 3 Erico Verissimo
discussion Ask the Expert: Troubleshooting High CPU in Catalyst Switches
Last Reply 14 hours 45 min ago.
1416 4 5 61 Abhishek Soni
discussion LAN Crashes
Last Reply 15 hours 12 min ago.
13 0 0 1 mark malone
discussion Joining a new 2960X switch to 2960S stack
Last Reply 15 hours 34 min ago.
20 0 0 3 amikat
discussion Output QoS policy is not matching DSCP values in marked packets
Last Reply 16 hours 13 sec ago.
7 0 0 0 robot fingers
Filter Results
Subject Views Rating Comments Author
How to use Time-Domain Reflectometer (TDR)
Last Reply 24 min 4 sec ago.
90404
5.0
84 Leo Laohoo
Understanding MSFC, PFC and DFC roles in Catalyst 6500 Series Switch
Last Reply 1 day 22 hours ago.
56282
5.0
14 SunilKhanna
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 3 days 6 hours ago.
306754
5.0
43 plumbis
3850 switch - IOS XE upgrade Detailed (standalone)
Last Reply 6 days 22 hours ago.
10473
5.0
7 Furose Khan Mohammed Ali
IPV6 on the Cisco 877
Last Reply 1 week 3 days ago.
34750
5.0
0 Andrew Judson
QUICK TIPS: Installing Multiple Cisco Switches - Video
Last Reply 2 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 3 weeks 3 days ago.
15591
5.0
5 Sivagami Narayanan
DHCP Static Binding on Cisco IOS
Last Reply 3 weeks 6 days ago.
16
0.0
0 indrapalccna
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 3 weeks 6 days ago.
50296
4.7
60 ashirkar
OSPF and IS-IS Differences
Last Reply 1 month 6 days ago.
6877
5.0
3 inderdeeps
34 Things about OSPF
Last Reply 1 month 1 week ago.
32
0.0
0 inderdeeps
Nexus - vPC Recommendations
Last Reply 1 month 1 week ago.
25408
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.
19308
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 3 weeks ago.
2549
5.0
1 TCC_2
4500X-32 IOS upgrade procedure
Last Reply 1 month 3 weeks ago.
31
0.0
0 butturwa
How to Form a Catalyst 3850 Data-Stack and Power-Stack
Last Reply 2 months 1 week ago.
1049
5.0
2 Luis Villanueva Brito
How to configure Ether Switch Modules connected to a router
Last Reply 2 months 1 week ago.
2479
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.
201983
5.0
10 tahirshabbir
How to configure a Cisco Catalyst Express 500 series switch
Last Reply 2 months 3 weeks ago.
18346
5.0
3 TCC_2
Routing Protocol Selection Guide - IGRP, EIGRP, OSPF, IS-IS, BGP
Last Reply 3 months 6 days ago.
154761
4.0
2 Shaun Hummel
3850: Understanding interface configuration on NM modules
Last Reply 3 months 2 weeks ago.
33375
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 day ago.
50
0.0
1 junaidmumtazcisco
SSH version 2 no IOS cat4000-i5s-mz.122-25.EWA14.bin
Last Reply 4 months 2 weeks ago.
53
0.0
2 Sergio Alvares
SSH/Telnet not happening to Catalyst 6K due to SSH RSA_Sign:Private key not found.
Last Reply 4 months 3 weeks ago.
51
5.0
0 InayathUlla Sharieff
copying image on the Standby Sup issue sometimes seen < Unknown error 0>
Last Reply 4 months 3 weeks ago.
64
0.0
0 InayathUlla Sharieff
Filter Results
Subject Views Rating Comments Author
blog Loading an IOS on a switch via Xmodem
Last Reply 3 weeks 2 days ago.
65730
5.0
11 Aninda Chatterjee
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
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25010
4.7
13 Akula Jyoti Lakshmi
blog Collector Security
Last Reply 2 months 3 weeks ago.
18
0.0
0 marobbs
blog Who Should Attend The Kickoff Meeting?
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42
0.0
0 marobbs
blog Network Optimization: The 90-Day Plan
Last Reply 3 months 1 week ago.
52
0.0
0 marobbs
blog Prepare for the Collector
Last Reply 3 months 3 weeks ago.
33
0.0
0 marobbs
blog Expert Insights: Network Optimization
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55
0.0
0 marobbs
blog Network Compliance Analysis
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42
0.0
0 marobbs
blog Three Tips for a Successful Review Period
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44
0.0
0 marobbs
blog Nexus 7000 ACL logging (OAL)
Last Reply 4 months 3 days ago.
18615
5.0
8 Robert Taylor
blog Active /Active Internet Load balancing with High availability ( AS Prepend Path)
Last Reply 4 months 1 week ago.
213
5.0
0 Ganesh Hariharan
blog Output drops due to QoS on 2960/3560/3750 switches
Last Reply 7 months 1 week ago.
28534
5.0
1 Shashank Singh
blog License Activation on 4500
Last Reply 1 year 3 months ago.
773
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 1 year 3 months ago.
7683
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 1 year 6 months ago.
2913
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
Last Reply 1 year 6 months ago.
22242
5.0
3 ajaju
blog Configuring a frame-relay switch
Last Reply 1 year 8 months ago.
7826
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.
137
0.0
0 vishal_2007
blog OSPF over IPsec Tunnel stucks in INIT state
Last Reply 1 year 9 months ago.
489
5.0
0 hsticher
blog Pre-build SPT feature on Nexus - Benefits & Caveats
Last Reply 1 year 10 months ago.
1555
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.
8742
5.0
9 Ruchir Jain
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