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.

 

Provide answers to questions in this community that are awaiting a correct answer.

HiI have a Cisco Nexus 7000 dual homed to a pair of Dell s6000 switches in a VLT (like CIsco's VPC - same crap). There are 8 uplinks altogether - 4...
1 hour 1 min ago
I have several Catalyst 3850 24- and 48-P-L switches deployed on 3.7(0).  On all of them, I have:diagnostic schedule switch 1 test non-disruptive d...
1 hour 26 min ago
I have a pair of NX3548 with several UCS connected directly to ports in a VLAN. I have a vlan interface in the same vlan. The 2 Nexus switches are...
by jtabasz
2 hours 3 min ago
Hi All, Need opinions here on an old 6500 catalyst switch. We kept seeing an error log of SNMP auth fail in the switch. below is the log captured a...
4 hours 2 min ago
what is the command to disable sending "connection refused" messages?
7 hours 8 min ago
         
IP SLA 325 3 0 0 0
Routers 2 0 0 0 0
Switches 6733 569 6 1 0
Filter Results
Subject Views Votes Rating Replies Last replied by
discussion SPAN Session in 3750 STACK?
Last Reply 1 min 10 sec ago.
0 0 0 1 InayathUlla Sharieff
discussion vlan question
Last Reply 5 min 6 sec ago.
27 0 5 3 InayathUlla Sharieff
discussion Suspended LACP Ports and Their Implication
Last Reply 1 hour 1 min ago.
0 0 0 0 visitor68
discussion connecting my cisco 2950g switch to my wireless router
Last Reply 1 hour 9 min ago.
0 0 0 1 johnlloyd_13
discussion Port 49 Failing Scheduled Diagnostic
Last Reply 1 hour 26 min ago.
0 0 0 0 weylin.piegorsch
discussion Issue with Switch Stack "Unprovisioned" and Active Switch that is not present in the stack
Last Reply 1 hour 27 min ago.
5 0 0 1 Leo Laohoo
discussion Nexus 3548 not able to ping directly connected devices
Last Reply 2 hours 3 min ago.
0 0 0 0 jtabasz
discussion Root port selection
Last Reply 3 hours 4 min ago.
68 0 0 20 gregorydhenderson1
discussion SNMP auth fail | Network Analysis Module 6500
Last Reply 4 hours 2 min ago.
0 0 0 0 Anuar Shahrin
discussion ACL on Int VLAN Help
Last Reply 6 hours 34 min ago.
45 0 0 6 paul driver
discussion Accessing switch web management
Last Reply 7 hours 3 min ago.
42 0 0 6 rosaho
discussion Deny sending Connection Refused messages
Last Reply 7 hours 8 min ago.
0 0 0 0 dean.anderson@k...
discussion 4500x InterVLAN routing. Clients can't ping clients on different VLANS?
Last Reply 7 hours 20 min ago.
29 0 5 6 SalientsysIT
discussion CIWRP500-Z-K9 'striped' encryption - what does that mean?
Last Reply 7 hours 44 min ago.
3 0 5 2 MICHAEL TAYLOR
discussion SIP Priority / VOIP QoS issues
Last Reply 7 hours 55 min ago.
23 0 0 8 Adam Hudson
discussion What is the difference between SFP-GE-T and GLC-T?
Last Reply 8 hours 4 min ago.
16050 0 4.91667 5 CSCO10662744_2
discussion 2 office network with diff. ip segment on 1 link.
Last Reply 8 hours 14 min ago.
44 0 0 1 joshuacmoore
discussion can HRSP / VRRP be use in the such setup ?
Last Reply 9 hours 12 min ago.
77 0 5 11 Jon Marshall
discussion vrf Specify the vrf of source interface for logging transactions
Last Reply 9 hours 58 min ago.
0 0 0 0 ckgilliam
discussion C2960x Stack and switchport config change. Speed slow down in one switch
Last Reply 10 hours 40 min ago.
13 0 0 6 jhager001
discussion Migrating DataCenter over vPC
Last Reply 10 hours 43 min ago.
0 0 5 2 jhager001
discussion VMware installed CSR1000v Causes DUP Ping Response from Linux Hosts
Last Reply 11 hours 8 min ago.
172 2 5 11 steve-fuller
discussion 10GB routers
Last Reply 11 hours 44 min ago.
4 0 0 1 Joseph W. Doherty
discussion Does “set precedence 5” remark packets from EF to CS5?
Last Reply 11 hours 57 min ago.
4 0 0 2 Joseph W. Doherty
discussion jarbled commands when transferring copied config from one switch to another
Last Reply 12 hours 25 min ago.
20 0 0 6 matthew.jennings36
Filter Results
Subject Views Rating Comments Author
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 16 hours 55 min ago.
295178
5.0
38
The "%SPANTREE-7-BLOCK_PORT_TYPE : Blocking [chars] on [chars]. Inconsistent port type" message is logged on Cisco Catalyst switches
Last Reply 2 days 23 hours ago.
18681
0.0
2 TCC_2
%C4K_SUPERVISOR-2-SOFTERROR / %C4K_SUPERVISOR-2-FPGASOFTERROR
Last Reply 5 days 20 hours ago.
4
0.0
0 InayathUlla Sharieff
Egress QOS
Last Reply 5 days 21 hours ago.
53764
5.0
14 somgupta
CAM (Content Addressable Memory) VS TCAM (Ternary Content Addressable Memory)
Last Reply 1 week 1 day ago.
51946
4.6
7 Thamaraiselvam Santhanam
How to Form a Catalyst 3850 Data-Stack and Power-Stack
Last Reply 1 week 5 days ago.
110
0.0
0 Luis Villanueva Brito
Properly Installing Cisco USB Console Driver
Last Reply 2 weeks 21 hours ago.
118
0.0
1 lsgabrillo
How to define the VLANs allowed on a trunk link
Last Reply 2 weeks 2 days ago.
188483
5.0
3 TCC_2
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 3 weeks 4 days ago.
125504
4.7
53
3850 switch - IOS XE upgrade Detailed (standalone)
Last Reply 3 weeks 4 days ago.
6130
5.0
5 Furose Khan Mohammed Ali
Error Message:%ILPOWER-3-CONTROLLER_PORT_ERR: Controller port error, Interface <interface> Power Controller reports power Imax error detected
Last Reply 1 month 4 days ago.
13780
5.0
4 Sivagami Narayanan
Running 40 routers with IOU in 4GB RAM
Last Reply 1 month 5 days ago.
61
0.0
0 Sudeb Das
"Etherchannel Loadbalancing on Catalyst Switches"
Last Reply 1 month 1 week ago.
21617
5.0
3 Souvik Ghosh
SSH version 2 no IOS cat4000-i5s-mz.122-25.EWA14.bin
Last Reply 1 month 2 weeks ago.
24
0.0
1 Sergio Alvares
Cisco Nexus 7000 / 7700 Line Cards
Last Reply 1 month 2 weeks ago.
156
0.0
0 Shaun Hummel
Cisco 891 fresh configuration/management without console cable
Last Reply 2 months 2 weeks ago.
35
0.0
0 totardo.tobing11
3850x VLAN Switch Port Active but no MAC or IP Address
Last Reply 2 months 2 weeks ago.
148
0.0
2 TOM FRANCHINA
How to define the VLANs allowed on a trunk link
Last Reply 2 months 2 weeks ago.
45
0.0
0 KHALEELUR RAHMAN.A
unable to ping pc from (vlan-A) to pc on (vlan-B)
Last Reply 2 months 3 weeks ago.
45
0.0
0 minestraschaos1
The VLAN goes to the administratively down state if two or more VLANs are configured
Last Reply 3 months 1 day ago.
26837
3.7
4 TCC_2
Importance of BPDU Guard and BPDU Filter !!
Last Reply 3 months 1 day ago.
101082
4.7
12 ganeshh.iyer
The "%SPANTREE-SP-2-RECV_BAD_TLV:" error Cat 6500 Cisco IOS system software
Last Reply 3 months 5 days ago.
4231
0.0
0 TCC_2
3850 Boot Mode
Last Reply 3 months 6 days ago.
1810
0.0
1 Collin Clark
LICENSING on 2900/3500/3700
Last Reply 3 months 1 week ago.
19251
0.0
3 ranraju
Router Cisco 2921 auto reboot
Last Reply 3 months 2 weeks ago.
87
0.0
4 npsangvt1
Filter Results
Subject Views Rating Comments Author
blog Loading an IOS on a switch via Xmodem
Last Reply 1 day 13 hours ago.
50184
5.0
8 Aninda Chatterjee
blog Output drops due to QoS on 2960/3560/3750 switches
Last Reply 2 months 1 day ago.
26212
5.0
1 Shashank Singh
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
Last Reply 7 months 6 days ago.
20838
4.6
12 jakula
blog License Activation on 4500
Last Reply 10 months 2 weeks ago.
421
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 10 months 3 weeks ago.
7386
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 1 year 1 month ago.
2523
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
Last Reply 1 year 1 month ago.
18788
5.0
3 ajaju
blog Configuring a frame-relay switch
Last Reply 1 year 3 months ago.
6704
5.0
7 Aninda Chatterjee
blog Upcoming Ask the Expert Event Featuring Ahmad Manzoor - Senior Pre-Sales Engineer at AGCN
Last Reply 1 year 3 months ago.
383
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 3 months ago.
129
0.0
0 Francine Richards
blog Cisco WCCP with Bluecoat (Multicast mode)
Last Reply 1 year 4 months ago.
123
0.0
0 vishal_2007
blog OSPF over IPsec Tunnel stucks in INIT state
Last Reply 1 year 4 months ago.
404
5.0
0 hsticher
blog Pre-build SPT feature on Nexus - Benefits & Caveats
Last Reply 1 year 4 months ago.
1434
5.0
0 srereddy
blog Link de-bounce timer operation when used on SFP+ ports on Nexus switches
Last Reply 1 year 4 months ago.
761
5.0
2 srereddy
blog Flexlink in Cisco Layer 2 network
Last Reply 1 year 4 months ago.
129
5.0
0 jakula
blog Community Tech-Talk Series: Troubleshooting High CPU due to Multicast
Last Reply 1 year 5 months ago.
8312
5.0
9 rucjain
blog Chalk Talk: The Secret to Successful QoS Deployments: A Well-Defined End-to-End QoS Strate
Last Reply 1 year 5 months ago.
289
0.0
0 Julie Burruss
blog Switch: How to test a cable status?
Last Reply 1 year 5 months ago.
7841
5.0
3 Anand G
blog Difference between N7K-M132XP -12 and N7K-M132XP -12L
Last Reply 1 year 9 months ago.
514
0.0
1 Ramu Gajula
blog About "TestErrorCounterMonitor" in 6500/7600
Last Reply 2 years 2 weeks ago.
2070
4.7
1 Anand G
blog Parity Error.
Last Reply 2 years 1 month ago.
2397
4.5
4 InayathUlla Sharieff
blog Nexus 7000 ACL logging (OAL)
Last Reply 2 years 1 month ago.
16998
5.0
7 Robert Taylor
blog Multicast for the heart Part I: IGMP
Last Reply 2 years 9 months ago.
4424
4.8
1 Aninda Chatterjee
blog Router Crashes
Last Reply 2 years 10 months ago.
5922
5.0
1 ajaju
blog Leak Map - Eigrp, Some leaks are useful..
Last Reply 3 years 1 month ago.
11401
5.0
7 pnagpal
Filter Results
LAN, Switching and Routing
Views: 0
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
by
LAN, Switching and Routing
Views: 1077
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
by
LAN, Switching and Routing
Views: 1218
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
by
LAN, Switching and Routing
Views: 769
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
LAN, Switching and Routing
Views: 16520
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 4.8 (4 ratings)
LAN, Switching and Routing
Views: 340
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 408
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 4 (1 ratings)
LAN, Switching and Routing
Views: 234
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 222
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 532
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
LAN, Switching and Routing
Views: 8
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 46
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 36
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 413
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 658
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 389
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (3 ratings)
by rucjain
LAN, Switching and Routing
Views: 399
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (4 ratings)
LAN, Switching and Routing
Views: 14
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 324
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (2 ratings)
LAN, Switching and Routing
Views: 227
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Filter Results

Events

May 11
Ask the Expert
April 13
Ask the Expert
January 5
Ask the Expert
July 21, 2014
Ask the Expert
March 31, 2014
Ask the Expert
April 1, 2014
Webcasts
March 10, 2014
Webcasts
July 30, 2012
Ask the Expert
December 12, 2012
Techtalks
  • 1
  • 2
  • 3
  • 4
  • 5
July 27, 2012
Facebook Forums
  • 1
  • 2
  • 3
  • 4
  • 5
December 31, 1969
Facebook Forums
May 25, 2012
Facebook Forums
  • 1
  • 2
  • 3
  • 4
  • 5
October 11, 2011
Facebook Forums
  • 1
  • 2
  • 3
  • 4
  • 5
January 6, 2014
Ask the Expert
  • 1
  • 2
  • 3
  • 4
  • 5
October 21, 2013
Ask the Expert
January 17, 2012
Webcasts
October 11, 2009
Ask the Expert
  • 1
  • 2
  • 3
  • 4
  • 5
August 1, 2011
Ask the Expert
  • 1
  • 2
  • 3
  • 4
  • 5
August 15, 2011
Ask the Expert
  • 1
  • 2
  • 3
  • 4
  • 5
August 29, 2011
Ask the Expert
  • 1
  • 2
  • 3
  • 4
  • 5
October 10, 2011
Ask the Expert
  • 1
  • 2
  • 3
  • 4
  • 5

Actions

 
 

Popular Discussions

Popular Documents

Rank Username Points
1 17,732
2 10,013
3 8,437
4 8,223
5 8,204
Rank Username Points
455
209
182
107
92