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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Hi guys, I'm a little confused about how the VTP Pruning acts, monitoring traffic on an interface realized that traffic from one pruned vlan still...
1 hour 37 min ago
Hi,Please see the attached file to understatnd the scenario. Currently We are running Setup A and then suddenly Link From Office 2 goes down.So wha...
8 hours 39 min ago
Hellowe're running some issues with IE-3000 units used in CCTV application, attached are screenshots files, camera are powerd by 12VDC, they are lo...
8 hours 45 min ago
Hi, I have recentrecently deployed 3 Cisco SG220-26P switches which are located in 3 separate blogs (fiber connected) and having issues (not sure i...
16 hours 15 min ago
I have a few Access Points (541N-A-k9) at a customer's site and they just purchased about 60 HP Stream Laptops. (not including other laptops and iP...
22 hours 34 min ago
         
IP SLA 325 3 0 0 0
Routers 2 0 0 0 0
Switches 6733 569 6 1 0
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Subject Views Votes Rating Replies Last replied by
discussion VSS on 4500x
Last Reply 18 sec ago.
0 0 0 5 Reza Sharifi
discussion Cisco 2951 ISR Router boot issue
Last Reply 3 min 44 sec ago.
12 0 0 6 hamid khan
discussion Rackmount kit for C3750G-24WS-S25
Last Reply 13 min 23 sec ago.
8 0 0 1 JP Babiera
discussion SIP Priority / VOIP QoS issues
Last Reply 15 min 21 sec ago.
2 0 0 1 Adam Hudson
discussion 3650 vs 3650G
Last Reply 19 min 37 sec ago.
0 0 0 6 linda.blaser1
discussion Cisco 6800 supervisor with X210G-LR
Last Reply 1 hour 8 min ago.
0 0 0 3 InayathUlla Sharieff
discussion can HRSP / VRRP be use in the such setup ?
Last Reply 1 hour 23 min ago.
39 0 5 6 KOH SZE JIE
discussion VTP Pruning is enabled and working, but traffic is still allowed on the trunk.
Last Reply 1 hour 35 min ago.
0 0 0 0 caulimedeiros
discussion Cisco 881W - password recovery for AP module
Last Reply 2 hours 55 min ago.
6961 1 5 5 robert.germanovich
discussion Catalyst 3750x switch stack experiencing stack port flapping issue
Last Reply 3 hours 20 min ago.
11 1 0 2 Anthony Filice
discussion l2 switching OR l3 routing..if we found a l2 table entry
Last Reply 3 hours 48 min ago.
6 0 0 5 Peter Paluch
discussion Telnet problem to access switch
Last Reply 3 hours 48 min ago.
16 0 5 3 mark malone
discussion Nexus QSFP N55-MQ4 compatibile with QSFP-40G-SR-BD
Last Reply 4 hours 1 min ago.
29 0 5 8 Reza Sharifi
discussion Cisco2951 and Cisco2921 in HSRP?
Last Reply 4 hours 6 min ago.
1603 0 0 2 Vignesh Srinivasan
discussion What does a fabric module do in a Nexus switch?
Last Reply 4 hours 16 min ago.
19 0 0 5 steve-fuller
discussion replacement for cisco 2621 router
Last Reply 4 hours 26 min ago.
12 1 0 5 Joseph W. Doherty
discussion QoS for home use
Last Reply 4 hours 33 min ago.
49 0 5 7 Joseph W. Doherty
discussion UC540W-FXO-K9
Last Reply 5 hours 48 min ago.
5 0 5 2 Mickey Shek
discussion 3850 > Diagnostic Monitoring is not implemented
Last Reply 6 hours 47 min ago.
0 0 0 1 mark malone
discussion 2901 Router LAN Ports?
Last Reply 7 hours 5 min ago.
29 0 4 3 Jon Marshall
discussion C3750, port isolation
Last Reply 7 hours 31 min ago.
27 0 5 6 paul driver
discussion DHCP Address Conflict : Decline conflict and PING_Conflict issue
Last Reply 8 hours 21 min ago.
5055 1 5 5 paul driver
discussion 2 office network with diff. ip segment on 1 link.
Last Reply 8 hours 39 min ago.
0 0 0 0 arvin_robel1
discussion Catalyst 2960 "auto qos voip cisco-phone" clarification required
Last Reply 8 hours 40 min ago.
23 0 0 1 Alexey Stytsenko
discussion IE-3000 issues in CCTV application
Last Reply 8 hours 45 min ago.
0 0 0 0 Mikheil Melia
Filter Results
Subject Views Rating Comments Author
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 20 min 15 sec ago.
294977
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 7 hours ago.
18681
0.0
2 TCC_2
%C4K_SUPERVISOR-2-SOFTERROR / %C4K_SUPERVISOR-2-FPGASOFTERROR
Last Reply 5 days 3 hours ago.
2
0.0
0 InayathUlla Sharieff
Egress QOS
Last Reply 5 days 4 hours ago.
53725
5.0
14 somgupta
CAM (Content Addressable Memory) VS TCAM (Ternary Content Addressable Memory)
Last Reply 1 week 1 day ago.
51785
4.6
7 Thamaraiselvam Santhanam
How to Form a Catalyst 3850 Data-Stack and Power-Stack
Last Reply 1 week 5 days ago.
104
0.0
0 Luis Villanueva Brito
Properly Installing Cisco USB Console Driver
Last Reply 2 weeks 5 hours ago.
109
0.0
1 lsgabrillo
How to define the VLANs allowed on a trunk link
Last Reply 2 weeks 2 days ago.
187991
5.0
3 TCC_2
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 3 weeks 4 days ago.
125038
4.7
53
3850 switch - IOS XE upgrade Detailed (standalone)
Last Reply 3 weeks 4 days ago.
6083
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 4 days ago.
60
0.0
0 Sudeb Das
"Etherchannel Loadbalancing on Catalyst Switches"
Last Reply 1 month 1 week ago.
21535
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.
151
0.0
0 Shaun Hummel
Cisco 891 fresh configuration/management without console cable
Last Reply 2 months 2 weeks ago.
33
0.0
0 totardo.tobing11
3850x VLAN Switch Port Active but no MAC or IP Address
Last Reply 2 months 2 weeks ago.
147
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 15 hours ago.
26776
3.7
4 TCC_2
Importance of BPDU Guard and BPDU Filter !!
Last Reply 3 months 1 day ago.
100784
4.7
12 ganeshh.iyer
The "%SPANTREE-SP-2-RECV_BAD_TLV:" error Cat 6500 Cisco IOS system software
Last Reply 3 months 4 days ago.
4213
0.0
0 TCC_2
3850 Boot Mode
Last Reply 3 months 5 days ago.
1796
0.0
1 Collin Clark
LICENSING on 2900/3500/3700
Last Reply 3 months 1 week ago.
19219
0.0
3 ranraju
Router Cisco 2921 auto reboot
Last Reply 3 months 1 week 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
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