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.

Hi,I have a pair of Catalyst 6500 switches and another pair of Nexus 7000 Switches. Catalyst 6500 has few set of vlans for which it's a spanning-tr...
37 min 14 sec ago
Hi All I am way out of my depth on this one, We have had a Vulnerability Assessment done with a result coming back that we have SSLv3 enabled, whic...
45 min 57 sec ago
Hi all,      I observed the below logs in one of the switch (Nexus 3000- version 5.0(3)U1(1a)). I have few question for this logs. Do this logs imp...
1 hour 7 min ago
Dear Support, We are not able to analyses Logs in cisco Nexus switches because of aggregation of same kind of log massages. Please provide the comm...
2 hours 20 min ago
I've attached a network diagram to make this easier to diagnose. I've been messing with this for some time, and it's taking longer than I'd like (m...
11 hours 13 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 Memory card on router
Last Reply 43 sec ago.
19 0 0 5 Karsten Iwen
discussion Vulnerability Assessment SSLV3 Poodle attack
Last Reply 4 min 40 sec ago.
0 0 0 0 haydn.tickner5
discussion Control Plane, Data Plane and Back Plane
Last Reply 18 min 24 sec ago.
7 0 0 2 vaib7av.shirkul
discussion SG500X
Last Reply 23 min 54 sec ago.
7 0 0 3 vaib7av.shirkul
discussion vlan translation between Catalyst 6500 and Nexus 7000 switches
Last Reply 37 min 14 sec ago.
0 0 0 0 Saroj Pariyar
discussion subnet help
Last Reply 1 hour 3 min ago.
0 0 0 1 kevin.szatkowski
discussion Error : bcm_usd_isr_switch_event_cb:429
Last Reply 1 hour 7 min ago.
0 0 0 0 PdhineshK
discussion Logs error
Last Reply 2 hours 20 min ago.
0 0 0 0 sreejith_r
discussion when "show interfaces status" find that vlan column is routed
Last Reply 2 hours 48 min ago.
26 0 5 4 Ranji Prem Andrew P
discussion Running configuration path in cisco 6506 chasis
Last Reply 3 hours 3 min ago.
3 0 0 2 Suryanarayana Chintu
discussion Setup an inbound ACL when NAT is used?
Last Reply 3 hours 15 min ago.
3 0 0 2 Hitesh Vinzoda
discussion read only Profile creation in 3750X switch
Last Reply 3 hours 20 min ago.
4 0 5 1 mark malone
discussion dmvpn with totally stub area
Last Reply 3 hours 47 min ago.
27 0 5 6 Traian Bratescu
discussion 1000BaseSX SFP GIG port errors - DOWN/DOWN. Rx power low alarm; Operating value: -25.7 dBm
Last Reply 4 hours 43 min ago.
0 0 0 1 Leo Laohoo
discussion cisco 3750x 24 port poe switch failure
Last Reply 5 hours 19 min ago.
90 0 0 4 zakfleming1
discussion Quality of Service on Cisco 2940
Last Reply 5 hours 25 min ago.
18 0 5 2 bayates826
discussion Trying to exclude shared files (wireless / Netgear 4500) from network (RV042G --> SG300-20)
Last Reply 6 hours 26 min ago.
3 0 0 0 s_kowalczyk86
discussion switch management issue
Last Reply 6 hours 34 min ago.
21 0 0 4 Hitesh Vinzoda
discussion Cisco 3850 Stacking question
Last Reply 7 hours 31 min ago.
0 0 0 1 Madhukrishnan G...
discussion NBAR discovery passive ftp
Last Reply 8 hours 55 min ago.
36 0 5 4 guanbowen
discussion I can't make ping from the router to the CUCM server (VMWARE WORKSTARION on window)
Last Reply 9 hours 23 min ago.
9 0 0 1 kevin.szatkowski
discussion Storm control blocking
Last Reply 10 hours 5 min ago.
7 0 0 2 Madhukrishnan G...
discussion Duplicate IP's
Last Reply 13 hours 5 min ago.
40 0 0 3 kevin.szatkowski
discussion SWITCH 3850 NETWORK MODULE AND GLC-SX-MM COMPATIBILITY
Last Reply 13 hours 56 min ago.
23 0 0 4 ROGER FERNANDO ...
discussion Switching
Last Reply 14 hours 5 min ago.
12 0 0 1 Leo Laohoo
Filter Results
Subject Views Rating Comments Author
Running 40 routers with IOU in 4GB RAM
Last Reply 1 hour 48 min ago.
0
0.0
0 Sudeb Das
"Etherchannel Loadbalancing on Catalyst Switches"
Last Reply 1 week 17 hours ago.
20764
5.0
3 Souvik Ghosh
SSH version 2 no IOS cat4000-i5s-mz.122-25.EWA14.bin
Last Reply 1 week 5 days ago.
17
0.0
1 Sergio Alvares
Cisco Nexus 7000 / 7700 Line Cards
Last Reply 1 week 5 days ago.
42
0.0
0 Shaun Hummel
Egress QOS
Last Reply 3 weeks 1 day ago.
52804
5.0
13 somgupta
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 4 weeks 19 hours ago.
50296
4.7
51 ashirkar
Cisco 891 fresh configuration/management without console cable
Last Reply 1 month 1 week ago.
24
0.0
0 totardo.tobing11
3850x VLAN Switch Port Active but no MAC or IP Address
Last Reply 1 month 1 week ago.
118
0.0
2 TOM FRANCHINA
How to define the VLANs allowed on a trunk link
Last Reply 1 month 1 week ago.
38
0.0
0 KHALEELUR RAHMAN.A
unable to ping pc from (vlan-A) to pc on (vlan-B)
Last Reply 1 month 2 weeks ago.
32
0.0
0 minestraschaos1
The VLAN goes to the administratively down state if two or more VLANs are configured
Last Reply 1 month 3 weeks ago.
25695
3.7
4 TCC_2
Importance of BPDU Guard and BPDU Filter !!
Last Reply 1 month 3 weeks ago.
95662
4.7
12 ganeshh.iyer
The "%SPANTREE-SP-2-RECV_BAD_TLV:" error Cat 6500 Cisco IOS system software
Last Reply 1 month 4 weeks ago.
4111
0.0
0 TCC_2
3850 Boot Mode
Last Reply 2 months 22 hours ago.
1592
0.0
1 Collin Clark
LICENSING on 2900/3500/3700
Last Reply 2 months 3 days ago.
18643
0.0
3 ranraju
Router Cisco 2921 auto reboot
Last Reply 2 months 1 week ago.
79
0.0
4 npsangvt1
ICANN: Name Collision Occurrence Management Framework. Special IP Address127.0.53.53
Last Reply 2 months 1 week ago.
49
0.0
0 josecesp
Spanning Tree Loop Troubleshooting and Safeguards
Last Reply 2 months 2 weeks ago.
47705
5.0
2 James D Hensley
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 2 months 2 weeks ago.
292332
5.0
37
The "%C4K_SWITCHMANAGER-4-S2WERRORREPORT" error message appears in the logs of a Cisco Catalyst 4500 Switch, and affects the functionality of PoE line cards
Last Reply 2 months 3 weeks ago.
8146
0.0
1 TCC_2
Password Recovery on Cisco Catalyst 3850
Last Reply 2 months 3 weeks ago.
3628
0.0
3 Collin Clark
Configuring a router Eth int or SVI to be a DHCP client
Last Reply 2 months 3 weeks ago.
4528
4.0
0 TCC_2
The card in a fixed hardware configuration Cat chassis functions improperly, not online
Last Reply 2 months 3 weeks ago.
634
0.0
0 TCC_2
How to configure a Flex Link for link-level redundancy in Cat switches that run IOS
Last Reply 2 months 3 weeks ago.
11454
0.0
0 TCC_2
%SYS-3-SYS_LCPERR3:Module X: Fatal exception occurred Cat 6k, WS-X6348-RJ45 module reset
Last Reply 2 months 3 weeks ago.
393
0.0
0 TCC_2
Filter Results
Subject Views Rating Comments Author
blog Output drops due to QoS on 2960/3560/3750 switches
Last Reply 3 weeks 4 days ago.
25748
5.0
1 Shashank Singh
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
Last Reply 6 months 17 hours ago.
19842
4.6
12 jakula
blog License Activation on 4500
Last Reply 9 months 2 weeks ago.
331
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 9 months 2 weeks ago.
7306
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 1 year 1 week ago.
2444
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
Last Reply 1 year 1 week ago.
18029
5.0
3 ajaju
blog Loading an IOS on a switch via Xmodem
Last Reply 1 year 1 month ago.
47035
5.0
7 Aninda Chatterjee
blog Configuring a frame-relay switch
Last Reply 1 year 2 months ago.
6466
5.0
7 Aninda Chatterjee
blog Upcoming Ask the Expert Event Featuring Ahmad Manzoor - Senior Pre-Sales Engineer at AGCN
Last Reply 1 year 2 months ago.
394
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 2 months ago.
9
0.0
0 Francine Richards
blog Cisco WCCP with Bluecoat (Multicast mode)
Last Reply 1 year 2 months ago.
119
0.0
0 vishal_2007
blog OSPF over IPsec Tunnel stucks in INIT state
Last Reply 1 year 3 months ago.
377
5.0
0 hsticher
blog Pre-build SPT feature on Nexus - Benefits & Caveats
Last Reply 1 year 3 months ago.
1407
5.0
0 srereddy
blog Link de-bounce timer operation when used on SFP+ ports on Nexus switches
Last Reply 1 year 3 months ago.
756
5.0
2 srereddy
blog Flexlink in Cisco Layer 2 network
Last Reply 1 year 3 months ago.
115
5.0
0 jakula
blog Community Tech-Talk Series: Troubleshooting High CPU due to Multicast
Last Reply 1 year 4 months ago.
8210
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 4 months ago.
289
0.0
0 Julie Burruss
blog Switch: How to test a cable status?
Last Reply 1 year 4 months ago.
7046
5.0
3 Anand G
blog Difference between N7K-M132XP -12 and N7K-M132XP -12L
Last Reply 1 year 7 months ago.
514
0.0
1 Ramu Gajula
blog About "TestErrorCounterMonitor" in 6500/7600
Last Reply 1 year 11 months ago.
2006
4.7
1 Anand G
blog Parity Error.
Last Reply 2 years 3 days ago.
2363
4.5
4 InayathUlla Sharieff
blog Nexus 7000 ACL logging (OAL)
Last Reply 2 years 3 weeks ago.
16580
5.0
7 Robert Taylor
blog Multicast for the heart Part I: IGMP
Last Reply 2 years 8 months ago.
4373
4.8
1 Aninda Chatterjee
blog Router Crashes
Last Reply 2 years 9 months ago.
5906
5.0
1 ajaju
blog Leak Map - Eigrp, Some leaks are useful..
Last Reply 3 years 2 weeks ago.
11072
5.0
7 pnagpal
Filter Results
LAN, Switching and Routing
Views: 1016
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 1199
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 754
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
LAN, Switching and Routing
Views: 15662
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 4.8 (4 ratings)
LAN, Switching and Routing
Views: 315
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 388
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 4 (1 ratings)
LAN, Switching and Routing
Views: 211
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 210
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 513
  • 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: 43
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 35
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 411
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 652
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 373
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (3 ratings)
by rucjain
LAN, Switching and Routing
Views: 375
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (4 ratings)
LAN, Switching and Routing
Views: 10
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
LAN, Switching and Routing
Views: 323
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (2 ratings)
LAN, Switching and Routing
Views: 225
  • 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
August 15, 2014
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 17,555
2 9,881
3 8,217
4 8,198
5 8,159
Rank Username Points
249
131
110
106
106