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 I wonder if anyone could please provide me with some help/direction on troubleshooting the following event. %SYS-SP-3-CPUHOG: Task is running fo...
1 hour 28 min ago
Hello,We have 2 3850 stacks in our corporate office.  One stack is for users and the other is for severs.  We have been having alot of false positi...
5 hours 43 min ago
Setup situation2 x ASA 5510 with seperate ISP'sBoth ASA's connected to the same inside network 172.20.0.0/16On ASA_2 a dmz network with servers wit...
13 hours 10 min ago
I have customer that have DC power Batteries -24 -48 ,There is any problem that  the customer connect this batteries  to industrial IE4000 DC power...
15 hours 26 min ago
Hi, We are in a project where cisco hardware (routers & switches) will be installed in a site that will be close to electrical high voltage cab...
16 hours 51 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 2x ASA, 2x ISP, 1x DMZ
Last Reply 15 sec ago.
0 0 0 0 Karsten Kemper
discussion BGP in Firewall
Last Reply 39 min 20 sec ago.
8 0 0 2 sean_evershed
discussion Unable to communicate with new stack by IP address
Last Reply 1 hour 1 min ago.
0 0 0 2 stevebennettnz1
discussion CPUHOG MSG caused by UDLD
Last Reply 1 hour 28 min ago.
0 0 0 0 loveandrew821
discussion Why cannot configure link-state tracking on C3020 gi0/24?
Last Reply 1 hour 42 min ago.
12 0 5 2 northwindsy
discussion Duplicate IP's
Last Reply 2 hours 42 min ago.
14 0 0 1 kevin.szatkowski
discussion unknow protocol drops
Last Reply 3 hours 6 min ago.
4 0 5 2 kevin.szatkowski
discussion 4506 8-E Sup
Last Reply 4 hours 16 min ago.
12 0 5 2 Nicholas Clay
discussion 4500X - Virual Switch Stack Fail-over Not Working
Last Reply 5 hours 41 min ago.
25 0 5 3 Leo Laohoo
discussion Understanding Additional interfaces on stacked switch - 24 ports switch (Cisco Catalyst 2960XR-24TD-I)
Last Reply 5 hours 42 min ago.
10 0 5 3 Leo Laohoo
discussion IP device tracking on 3850 Switches
Last Reply 5 hours 43 min ago.
0 0 0 0 Jason Flory
discussion CSR1000v - Extra line/carriage return in telnet
Last Reply 6 hours 3 min ago.
42 1 5 7 kevin.szatkowski
discussion bridging multiple vlans across a T1 on a cisco 1921
Last Reply 6 hours 4 min ago.
1 0 0 1 Ryan Curry
discussion Catalyst 3750X IOS update questions
Last Reply 6 hours 10 min ago.
0 0 4 1 Ryan Curry
discussion Cisco 2960 Switch Configuration Questions
Last Reply 6 hours 16 min ago.
0 0 0 1 Ryan Curry
discussion switch management issue
Last Reply 7 hours 4 min ago.
0 0 0 1 Reza Sharifi
discussion SWITCH 3850 NETWORK MODULE AND GLC-SX-MM COMPATIBILITY
Last Reply 7 hours 19 min ago.
0 0 0 2 ROGER FERNANDO ...
discussion DHCP Taking A While For Wireless Devices
Last Reply 7 hours 34 min ago.
29 0 0 4 kyle.jones1
discussion password recovery mechanism disabled Cisco 3750
Last Reply 7 hours 54 min ago.
1 0 0 1 Dan Lukes
discussion TACACS+ with cisco 3560 switch configuration question
Last Reply 9 hours 42 min ago.
22 0 5 3 hod.nadav
discussion Switch port access and trunk on same interface
Last Reply 10 hours 15 sec ago.
9 0 0 2 glen.grant
discussion Nexus upgrade path
Last Reply 10 hours 4 min ago.
0 0 0 1 glen.grant
discussion VPC Nexus 5K - Portchannel with 1G and 10G
Last Reply 10 hours 35 min ago.
34 0 5 7 snarayanaraju
discussion Supervisor engine in Cisco 6500
Last Reply 11 hours 18 min ago.
5 0 5 2 Joseph W. Doherty
discussion SUP MODULE disable
Last Reply 11 hours 30 min ago.
1 0 0 1 Reza Sharifi
Filter Results
Subject Views Rating Comments Author
"Etherchannel Loadbalancing on Catalyst Switches"
Last Reply 6 days 11 hours ago.
20764
5.0
3 Souvik Ghosh
SSH version 2 no IOS cat4000-i5s-mz.122-25.EWA14.bin
Last Reply 1 week 3 days ago.
17
0.0
1 Sergio Alvares
Cisco Nexus 7000 / 7700 Line Cards
Last Reply 1 week 3 days ago.
42
0.0
0 Shaun Hummel
Egress QOS
Last Reply 3 weeks 8 hours ago.
52804
5.0
13 somgupta
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 3 weeks 6 days 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 1 month 4 weeks ago.
1592
0.0
1 Collin Clark
LICENSING on 2900/3500/3700
Last Reply 2 months 2 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 1 week 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 2 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
How to use Time-Domain Reflectometer (TDR)
Last Reply 2 months 4 weeks ago.
74455
5.0
68 Leo Laohoo
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
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