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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We have an intermittent issue with the L2L VPN. I couldnt pull the logs the time when the issue occured, but, please suggest some troubleshooting s...
1 min 14 sec ago
Hi Everyone, My Customer want upgrade 10Gig Link, thenI had a tried used 1 link 10Gig in WS-C3850-12S-S connect to 10Gig interface in WS-C3650-24TD...
15 min 50 sec ago
Hi, ExpertI need to configure a VLAN at switch SRW2024 v1.2. Normal trunking have to switch to switch, can I do trunking at one switch. Is mean I o...
24 min 48 sec ago
Hi,Can the loopguard and bpduguard features of cisco traditional stp (PVST+) configured also for RPVST+ (rapid PVST+)?If yes which are their corres...
1 hour 13 min ago
Hi all, i want to use PBR to filter some traffics and have tested by pinging from a single host to the internet.found that the ACL log, also PBR, d...
1 hour 17 min ago
         
IP SLA 325 3 0 0 0
Routers 2 0 0 0 0
Switches 6735 569 6 1 0
Filter Results
Subject Views Votes Rating Replies Last replied by
discussion Intermittent L2L VPN connectivity issue
Last Reply 1 min 14 sec ago.
0 0 0.0 0 srikanth ath
discussion Cisco3750 802.1X LLDP Voice and Data Routing
Last Reply 8 min 32 sec ago.
0 0 0.0 1 xavierloza1
discussion WS-C3850-12S-S with WS-C3650-24TD-S 10Gig Connection
Last Reply 15 min 50 sec ago.
0 0 0.0 0 Jasaatum_89
discussion VLAN Configure
Last Reply 24 min 48 sec ago.
0 0 0.0 0 januayap_85
discussion Packet tracer multiuser problem
Last Reply 44 min 35 sec ago.
0 0 0.0 1 Deepak Kumar
discussion Cisco Switch
Last Reply 53 min 38 sec ago.
0 0 0.0 1 Leo Laohoo
discussion Cisco 2811 thinks LAN IP has interface MAC address
Last Reply 1 hour 10 min ago.
0 0 0.0 1 johnd2310
discussion loopguard, bpdu guard for RSTP
Last Reply 1 hour 13 min ago.
0 0 0.0 0 adimnewtemp
discussion pinging not tracked in ACL, but tracked when traceroute
Last Reply 1 hour 17 min ago.
0 0 0.0 0 supachoke.ddth
discussion Issue with a spanning-tree protocol
Last Reply 1 hour 24 min ago.
0 0 0.0 2 Reza Sharifi
discussion Does it possible ASA 5512-X with Switch 2960 (Inter-Vlan)
Last Reply 3 hours 1 min ago.
0 0 5 8 chhayheng
discussion Strange issue maybe
Last Reply 3 hours 22 min ago.
0 0 0.0 5 CHARLES HILL
discussion Vlan is flapping in L2 switch
Last Reply 3 hours 23 min ago.
0 0 5 2 ssweehinlew
discussion block port 25 on single public IP ASA5505
Last Reply 3 hours 35 min ago.
0 0 0.0 4 coryjsanders
discussion N7K-SUP2 occured IO error and comfact flash failed message
Last Reply 3 hours 38 min ago.
0 0 0.0 2 Hongju Jung
discussion SNMP traffic through Site-to-Site VPN
Last Reply 13 hours 27 min ago.
0 0 0.0 0 Sbecker@holland...
discussion Static route setup help
Last Reply 4 hours 37 min ago.
0 0 0.0 3 jbpollard
discussion 10G LineCard support on 6th Slot of 6509-E Chassis
Last Reply 4 hours 39 min ago.
0 0 0.0 4 Leo Laohoo
discussion Consumer "WAN" port and what is really happening
Last Reply 4 hours 54 min ago.
0 0 0.0 0 DrisnilGardae
discussion MAC Address Aging Problem? Run out of Ideas
Last Reply 5 hours 24 min ago.
0 0 0.0 0 iew1018823
discussion Catalyst 3750 High CPU ARP INPUT
Last Reply 5 hours 37 min ago.
0 0 0.0 1 CHARLES HILL
discussion 6880-X VSS configured but some interface LEDs show OFF but working on Switch 2
Last Reply 6 hours 14 min ago.
0 0 0.0 3 Reza Sharifi
discussion What is final effect after putting access vlan # and trunk mode together under the same interface ?
Last Reply 6 hours 39 min ago.
0 0 0.0 3 Reza Sharifi
discussion VPC Domain ID change on N7k
Last Reply 6 hours 43 min ago.
0 0 0.0 1 Reza Sharifi
discussion Cisco Catalyst 2960-s can't connect to console via serial
Last Reply 6 hours 40 min ago.
0 0 0.0 2 CHARLES HILL
Filter Results
Subject Views Rating Comments Author
LICENSING on 2900/3500/3700
Last Reply 1 day 1 hour ago.
17396
0.0
3 ranraju
Router Cisco 2921 auto reboot
Last Reply 1 week 5 days ago.
0
0.0
4 npsangvt1
Egress QOS
Last Reply 1 week 3 days ago.
50321
5.0
11 somgupta
ICANN: Name Collision Occurrence Management Framework. Special IP Address127.0.53.53
Last Reply 1 week 4 days ago.
0
0.0
0 josecesp
Spanning Tree Loop Troubleshooting and Safeguards
Last Reply 4 years 3 months ago.
42740
5.0
2 James D Hensley
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 1 week 5 days ago.
104405
4.7
50 ashirkar
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 2 weeks 1 day ago.
286377
5.0
37 plumbis
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 weeks 5 days ago.
7832
0.0
1 TCC_2
Password Recovery on Cisco Catalyst 3850
Last Reply 3 weeks 2 days ago.
1972
0.0
3 Collin Clark
Configuring a router Eth int or SVI to be a DHCP client
Last Reply 5 years 11 months ago.
4322
4.0
0 TCC_2
The card in a fixed hardware configuration Cat chassis functions improperly, not online
Last Reply 5 years 11 months ago.
624
0.0
0 TCC_2
How to configure a Flex Link for link-level redundancy in Cat switches that run IOS
Last Reply 5 years 11 months ago.
11294
0.0
0 TCC_2
%SYS-3-SYS_LCPERR3:Module X: Fatal exception occurred Cat 6k, WS-X6348-RJ45 module reset
Last Reply 5 years 11 months ago.
383
0.0
0 TCC_2
How to use Time-Domain Reflectometer (TDR)
Last Reply 4 weeks 4 hours ago.
67347
5.0
68 Leo Laohoo
Retrieving Core files from Cisco Nexus switching platforms
Last Reply 2 years 11 months ago.
13282
5.0
1 Yogesh Ramdoss
Using 3850 Embedded Wireshark (Wired)
Last Reply 1 month 4 days ago.
35732
5.0
2 Colby Beam
The "%C6KENV-SP-4-MINORTEMPALARM:" error message displays in Catalyst 6500 series switches with Sup720 that runs Cisco IOS system software
Last Reply 1 month 5 days ago.
3625
0.0
1 TCC_2
Understanding SPAN,RSPAN,and ERSPAN
Last Reply 1 month 5 days ago.
34075
4.7
6 ashirkar
Temperature alarms on WS-X6904-40G
Last Reply 1 month 1 week ago.
10
5.0
0 Madhukrishnan Gopinathan Nair
How to configure an IP access list to control directed broadcasts for the Wake-on-LAN setup
Last Reply 1 month 1 week ago.
2811
0.0
1 TCC_2
Nexus - vPC Recommendations
Last Reply 1 month 1 week ago.
18575
5.0
3 pnagpal
Increased Total output drops/OutDiscards by QoS for Desktop Series Switches Products
Last Reply 1 month 2 weeks ago.
16
0.0
0 Csc TsWebDocs
Telnet session to FWSM module disconnects due to MTU size issues in 6500 or 7600 switches
Last Reply 5 years 11 months ago.
1412
0.0
0 TCC_2
X2-10GB-LRM vs X2-10GB-SR compatability
Last Reply 1 month 3 weeks ago.
1405
0.0
9 yogesh rajguru
Filter Results
Subject Views Rating Comments Author
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
Last Reply 4 months 5 days ago.
17786
4.6
12 jakula
blog License Activation on 4500
Last Reply 7 months 1 week ago.
201
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 7 months 2 weeks ago.
7154
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 10 months 2 weeks ago.
2274
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
Last Reply 10 months 2 weeks ago.
16081
5.0
3 ajaju
blog Loading an IOS on a switch via Xmodem
Last Reply 11 months 5 days ago.
40336
5.0
7 Aninda Chatterjee
blog Configuring a frame-relay switch
Last Reply 1 year 1 week ago.
5999
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 weeks 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 2 weeks ago.
124
0.0
0 Francine Richards
blog Cisco WCCP with Bluecoat (Multicast mode)
Last Reply 1 year 4 weeks ago.
107
0.0
0 vishal_2007
blog OSPF over IPsec Tunnel stucks in INIT state
Last Reply 1 year 1 month ago.
328
5.0
0 hsticher
blog Pre-build SPT feature on Nexus - Benefits & Caveats
Last Reply 3 years 2 weeks ago.
1329
5.0
0 srereddy
blog Link de-bounce timer operation when used on SFP+ ports on Nexus switches
Last Reply 2 years 11 months ago.
743
5.0
2 srereddy
blog Flexlink in Cisco Layer 2 network
Last Reply 2 years 3 months ago.
94
5.0
0 jakula
blog Output drops due to QoS on 2960/3560/3750 switches
Last Reply 4 years 1 month ago.
24555
5.0
0 Shashank Singh
blog Community Tech-Talk Series: Troubleshooting High CPU due to Multicast
Last Reply 2 years 2 weeks ago.
7925
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 2 months ago.
276
0.0
0 Julie Burruss
blog Switch: How to test a cable status?
Last Reply 1 year 2 months ago.
5448
5.0
3 Anand G
blog Difference between N7K-M132XP -12 and N7K-M132XP -12L
Last Reply 1 year 5 months ago.
1627
0.0
1 ramugaju
blog About "TestErrorCounterMonitor" in 6500/7600
Last Reply 1 year 9 months ago.
1859
4.7
1 Anand G
blog Parity Error.
Last Reply 1 year 10 months ago.
2294
4.5
4 InayathUlla Sharieff
blog Nexus 7000 ACL logging (OAL)
Last Reply 1 year 10 months ago.
15705
5.0
7 Robert Taylor
blog Multicast for the heart Part I: IGMP
Last Reply 2 years 6 months ago.
4236
4.8
1 Aninda Chatterjee
blog Router Crashes
Last Reply 2 years 7 months ago.
5822
5.0
1 ajaju
blog Leak Map - Eigrp, Some leaks are useful..
Last Reply 2 years 10 months ago.
10458
5.0
7 pnagpal
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