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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This entry relates in part to the observation that while there is a clear best practice document for VPCs on Nexus 7K ("Design and Configuration Gu...
by 9gmiles
2 hours 5 min ago
Hello!I'm test nat on asr-1002x router. Router terminate about ~15000 pppoe users. About ~2000 vlans.Router has 3x10G links.Shaping, netflow.When r...
20 hours 4 min ago
Hi all this is my first post hope posting on the right group, if not please let me know. We recently installed a new data line and now all traffic...
23 hours 27 min ago
Hi,I want to make the L3 remote SPAN to make the PSTN voice logging function.Actually, I have to compare the VLAN 142 and VLAN 212, because I have...
1 day 6 hours ago
Hi,We recently have an incident, Some of our manufacturing tools are using legacy devices and a user connects a new PC to the network, has a softwa...
1 day 7 hours 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 Votessort ascending Rating Replies Last replied by
discussion 3750x Stack is repeatedly showing error " %ADJ-3-RESOLVE_REQ : Adj resolve request: Failed to resolve <IP Address> <vlan ID>..
Last Reply 7 months 21 hours ago.
10204 24 5 15 Garry Cross
discussion Experincing issues with 2960X switch
Last Reply 1 month 2 weeks ago.
24818 14 5.16667 58 Nickolus Looper
discussion %ENTROPY-0-ENTROPY_ERROR: Unable to collect sufficient entropy
Last Reply 7 months 3 weeks ago.
2661 10 0.0 6 Jeff Udis
discussion Fiber connection between c4503 and c2960x not working
Last Reply 1 year 7 months ago.
5600 9 5 23 agunesch
discussion WAP4410N wireless traffic locks up even when running latest firmware update
Last Reply 2 years 1 month ago.
3294 8 0.0 4 hfnistelrooy
discussion BUG ID:CSCts29063 %ADJ-3-RESOLVE_REQ: Adj resolve request: Failed to resolve
Last Reply 3 months 4 hours ago.
14391 8 5 14 josephson.villalobos
discussion Version 15.2(1)E on 4900M globally enables ip device tracking and can't remove it
Last Reply 1 year 3 months ago.
12782 8 0.0 11 desweiler
discussion MACSEC Combine with LACP + QinQ
Last Reply 3 years 4 months ago.
1148 8 0.0 0 leon.mflai
discussion To disable SSH Server CBC Mode Ciphers
Last Reply 6 months 1 day ago.
2094 7 0.0 3 enablecomp
discussion USB Console drivers Windows 8
Last Reply 1 month 3 weeks ago.
4562 7 5 14 arahmanICC
discussion Configuring and Troubleshooting Virtual Switching System (VSS)
Last Reply 1 year 4 months ago.
10538 7 4.40741 30 Anand G
discussion Windows 8 USB Comport issue Cisco Catalyst 2960-C
Last Reply 2 years 2 weeks ago.
1242 6 0.0 4 Reuben Farrelly
discussion bug me3600-24fs ?
Last Reply 1 year 7 months ago.
1405 6 0.0 2 Leo Laohoo
discussion cisco mini usb console driver for win 7
Last Reply 3 years 1 month ago.
183597 6 5 2 focused
discussion Nexus 5548 - %ARP-3-DUP_SRCIP_PROBE: Duplicate address Detected
Last Reply 1 year 5 months ago.
6496 5 4.5 8 julius.fuller.tfs
discussion 4500X GLC-T at 100M
Last Reply 1 week 3 days ago.
5358 5 0.0 8 Etienne Simard
discussion higher than normal cpu for fed (PunjectRx) process
Last Reply 5 months 3 weeks ago.
1415 5 0.0 7 Tzy Chun Chong
discussion High CPU usage - 3750 X stack
Last Reply 1 year 4 months ago.
27411 5 5 37 andre.weissflog
discussion Trustpool expiration on 3750-X
Last Reply 8 months 1 week ago.
1091 5 5 2 zhao lu
discussion MAC Address Flapping and SCCM Wake Up Proxy
Last Reply 3 months 1 week ago.
11004 5 0.0 6 Kevin Dorrell
discussion Nexus 5548 scheduled reload
Last Reply 1 year 1 month ago.
802 5 5 3 Reza Sharifi
discussion Memory leak on Catalyst 2960 & 2960S - similar to Bug CSCts52797
Last Reply 1 year 1 month ago.
9244 5 5 30 Pavel Pokorny
discussion Cisco 4500 Auto-QOS on Ether-Channel
Last Reply 1 year 10 months ago.
973 5 0.0 1 rhornberger
discussion 6500 Control Plane Interface Down
Last Reply 1 year 9 months ago.
448 5 0.0 0 rmeans
discussion Cisco 3750 showing high cpu with DHCPD Receive and IP Input process.
Last Reply 2 years 3 weeks ago.
875 5 0.0 0 nirav.bhatt
Filter Results
Subject Views Rating Comments Author
Virtual switching system (VSS) Configuration For Cisco 4500 series switches
Last Reply 2 days 7 hours ago.
114360
4.7
51 ashirkar
Egress QOS
Last Reply 4 days 2 hours ago.
51997
5.0
12 somgupta
Cisco 891 fresh configuration/management without console cable
Last Reply 2 weeks 14 hours ago.
11
0.0
0 totardo.tobing11
3850x VLAN Switch Port Active but no MAC or IP Address
Last Reply 2 weeks 18 hours ago.
76
0.0
2 TOM FRANCHINA
How to define the VLANs allowed on a trunk link
Last Reply 2 weeks 1 day ago.
25
0.0
0 KHALEELUR RAHMAN.A
unable to ping pc from (vlan-A) to pc on (vlan-B)
Last Reply 3 weeks 3 days ago.
24
0.0
0 minestraschaos1
The VLAN goes to the administratively down state if two or more VLANs are configured
Last Reply 4 weeks 1 day ago.
25022
3.7
4 TCC_2
Importance of BPDU Guard and BPDU Filter !!
Last Reply 4 weeks 1 day ago.
84068
4.7
12 ganeshh.iyer
The "%SPANTREE-SP-2-RECV_BAD_TLV:" error Cat 6500 Cisco IOS system software
Last Reply 1 month 3 days ago.
4046
0.0
0 TCC_2
3850 Boot Mode
Last Reply 1 month 4 days ago.
1457
0.0
1 Collin Clark
LICENSING on 2900/3500/3700
Last Reply 1 month 6 days ago.
18263
0.0
3 ranraju
Router Cisco 2921 auto reboot
Last Reply 1 month 1 week ago.
74
0.0
4 npsangvt1
ICANN: Name Collision Occurrence Management Framework. Special IP Address127.0.53.53
Last Reply 1 month 2 weeks ago.
47
0.0
0 josecesp
Spanning Tree Loop Troubleshooting and Safeguards
Last Reply 1 month 2 weeks ago.
46361
5.0
2 James D Hensley
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 1 month 2 weeks ago.
290788
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 1 month 3 weeks ago.
8074
0.0
1 TCC_2
Password Recovery on Cisco Catalyst 3850
Last Reply 1 month 4 weeks ago.
1972
0.0
3 Collin Clark
Configuring a router Eth int or SVI to be a DHCP client
Last Reply 1 month 4 weeks ago.
4475
4.0
0 TCC_2
The card in a fixed hardware configuration Cat chassis functions improperly, not online
Last Reply 1 month 4 weeks ago.
631
0.0
0 TCC_2
How to configure a Flex Link for link-level redundancy in Cat switches that run IOS
Last Reply 1 month 4 weeks ago.
11402
0.0
0 TCC_2
%SYS-3-SYS_LCPERR3:Module X: Fatal exception occurred Cat 6k, WS-X6348-RJ45 module reset
Last Reply 1 month 4 weeks ago.
393
0.0
0 TCC_2
How to use Time-Domain Reflectometer (TDR)
Last Reply 2 months 3 days ago.
72559
5.0
68 Leo Laohoo
Retrieving Core files from Cisco Nexus switching platforms
Last Reply 2 months 5 days ago.
14132
5.0
1 Yogesh Ramdoss
Using 3850 Embedded Wireshark (Wired)
Last Reply 2 months 1 week ago.
36460
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 2 months 1 week ago.
3775
0.0
1 TCC_2
Filter Results
Subject Views Rating Comments Author
blog Output drops due to QoS on 2960/3560/3750 switches
Last Reply 0 sec ago.
24555
5.0
1 Shashank Singh
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
Last Reply 5 months 5 days ago.
17786
4.6
12 jakula
blog License Activation on 4500
Last Reply 8 months 2 weeks ago.
201
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 8 months 3 weeks ago.
7154
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 11 months 2 weeks ago.
2274
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
Last Reply 11 months 2 weeks ago.
16081
5.0
3 ajaju
blog Loading an IOS on a switch via Xmodem
Last Reply 1 year 5 days ago.
40336
5.0
7 Aninda Chatterjee
blog Configuring a frame-relay switch
Last Reply 1 year 1 month 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 1 month 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 1 month ago.
124
0.0
0 Francine Richards
blog Cisco WCCP with Bluecoat (Multicast mode)
Last Reply 1 year 2 months ago.
107
0.0
0 vishal_2007
blog OSPF over IPsec Tunnel stucks in INIT state
Last Reply 1 year 2 months ago.
328
5.0
0 hsticher
blog Pre-build SPT feature on Nexus - Benefits & Caveats
Last Reply 1 year 2 months ago.
1329
5.0
0 srereddy
blog Link de-bounce timer operation when used on SFP+ ports on Nexus switches
Last Reply 1 year 2 months ago.
743
5.0
2 srereddy
blog Flexlink in Cisco Layer 2 network
Last Reply 1 year 2 months ago.
94
5.0
0 jakula
blog Community Tech-Talk Series: Troubleshooting High CPU due to Multicast
Last Reply 1 year 3 months 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 3 months ago.
276
0.0
0 Julie Burruss
blog Switch: How to test a cable status?
Last Reply 1 year 3 months ago.
5448
5.0
3 Anand G
blog Difference between N7K-M132XP -12 and N7K-M132XP -12L
Last Reply 1 year 6 months ago.
1627
0.0
1 Ramu Gajula
blog About "TestErrorCounterMonitor" in 6500/7600
Last Reply 1 year 10 months ago.
1859
4.7
1 Anand G
blog Parity Error.
Last Reply 1 year 11 months ago.
2294
4.5
4 InayathUlla Sharieff
blog Nexus 7000 ACL logging (OAL)
Last Reply 1 year 12 months ago.
15705
5.0
7 Robert Taylor
blog Multicast for the heart Part I: IGMP
Last Reply 2 years 7 months ago.
4236
4.8
1 Aninda Chatterjee
blog Router Crashes
Last Reply 2 years 8 months ago.
5822
5.0
1 ajaju
blog Leak Map - Eigrp, Some leaks are useful..
Last Reply 2 years 11 months ago.
10458
5.0
7 pnagpal
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