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, assume there is a multicast sender, and this traffic is supposed to be received to 10 receivers only in order to prevent un-authorized IPs fro...
47 min 9 sec ago
Hi all, Does any one know where i can find the lastest ios that cisco as published for catalyst 2948G . Thanks Patcbr600
1 hour 8 min ago
I have a current situation where I need to add a subnet. I have created a secondary IP (192.168.101.253). Hosts on the primary (192.168.1.0) can se...
1 hour 9 min ago
Hello Is ospfv3   ipv4  address family available on the Nexus 9k - I can configure it on a Cisco ASR but the command in not available on the Nexus...
3 hours 10 min ago
Hi all ,  I just configured the the ICMP-Jitter in my Cisco switch .. My problem i can't set the size of packet .. So is there any way to add size...
5 hours 26 min ago
         
IP SLA 325 3 0 0 0
Routers 2 0 0 0 0
Switches 6724 569 6 1 0
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Subject Views Votes Rating Replies Last replied by
discussion DMVPN can't be done for ssecond spoke in GNS3
Last Reply 6 min 19 sec ago.
11 0 0 1 Tim Y
discussion Low Voltage Alarm on interfaces with specific SFPs.
Last Reply 48 min 12 sec ago.
0 0 0 5 Reza Sharifi
discussion shaping the real time traffic
Last Reply 1 hour 7 min ago.
1 0 5 3 kajatonas88
discussion Adding a physical device in a virtual design?
Last Reply 1 hour 17 min ago.
79 0 5 22 DAVIDsTEA_Inc
discussion Unplug ALL headsets or phones won't power up?
Last Reply 1 hour 22 min ago.
54 1 0 8 pwwiddicombe
discussion ARP ICMP
Last Reply 1 hour 22 min ago.
9 0 0 1 Bhishma Khanna
discussion VRRP configuration
Last Reply 1 hour 34 min ago.
10 0 0 1 Philip D'Ath
discussion Packet size setting
Last Reply 1 hour 34 min ago.
17 0 0 3 Carlos Villagran
discussion ISL between 2960S and 2960X stacks
Last Reply 2 hours 5 min ago.
4 0 0 1 Philip D'Ath
discussion ipv6 between Cisco 1841 & Cisco 1811
Last Reply 2 hours 22 min ago.
13 0 0 6 Philip D'Ath
discussion Cannot ping vlan gateway on Nexus switches when trunking to access layer switch
Last Reply 2 hours 25 min ago.
7 0 5 4 dgso_admin
discussion Creating a WiFi hotspot
Last Reply 2 hours 36 min ago.
27 0 0 6 Philip D'Ath
discussion WS-3560CX-8XPD-S Licensing Question
Last Reply 3 hours 30 min ago.
0 0 0 1 Reza Sharifi
discussion connecting my cisco 2950g switch to my wireless router
Last Reply 3 hours 39 min ago.
39 1 0 7 rmott19811
discussion Connect two networks with different subnets
Last Reply 3 hours 44 min ago.
3 0 0 4 Tim Y
discussion Finding an issue inside the same vlan
Last Reply 5 hours 29 min ago.
12 0 5 6 girchand
discussion Trouble with 2960X Stack IOS Upgrade
Last Reply 5 hours 34 min ago.
0 0 0 0 Terence Lockette
discussion Troubleshooting a switch to switch connection issue
Last Reply 5 hours 34 min ago.
18 0 0 11 Process153
discussion 3850 stack with data broadcast to all ports
Last Reply 6 hours 16 min ago.
10 0 0 5 Carlos Villagran
discussion packet tracer problem with three connected router
Last Reply 6 hours 53 min ago.
9 0 0 1 Borgenstrand
discussion No DHCP crossing over trunk
Last Reply 7 hours 5 min ago.
21 0 0 9 ChristopheVL
discussion Does LACP or PAGP Aggregate bandwidth
Last Reply 7 hours 23 min ago.
6 0 5 5 Joseph W. Doherty
discussion Cisco Nexus 5548UP upgrade fail - version 7.2
Last Reply 7 hours 28 min ago.
264 1 5 7 teracomcco
discussion ISP Handoff to 2950
Last Reply 7 hours 39 min ago.
58 0 0 7 [email protected]
discussion Is there a specific command to show the queue buffer size of one port-group on WS-X6904-40G?
Last Reply 8 hours 12 min ago.
2 0 0 1 Iulian Vaideanu
Filter Results
Subject Views Ratingsort descending Comments Author
CEF
Last Reply 6 years 11 months ago.
1167
0.0
0 ITA Terms
Catalyst 4948
Last Reply 6 years 9 months ago.
1653
0.0
0 Ashley Price
Cisco_Catalyst_6506-E_Switch
Last Reply 6 years 9 months ago.
1898
0.0
0 Ashley Price
Cisco_Catalyst_6509-E_Switch
Last Reply 6 years 9 months ago.
2560
0.0
0 Ashley Price
SFP
Last Reply 6 years 11 months ago.
4185
0.0
0 ITA Terms
GARP
Last Reply 6 years 9 months ago.
7638
0.0
0 ITA Terms
GMRP
Last Reply 5 years 3 months ago.
4852
0.0
0 ITA Terms
How to Configure Private Hosts in a Cisco Catalyst 6500 switch
Last Reply 6 years 10 months ago.
2173
0.0
0 SunilKhanna
MAC Addresses used by the Cisco 3750
Last Reply 6 years 11 months ago.
1718
0.0
0 Oliver Gorwits
Module status shows unsupported module when installed in slot 10 of the Catalyst 4510R Switch chassis with Supervisor V
Last Reply 6 years 11 months ago.
1115
0.0
0 SunilKhanna
The power management and environmental monitoring features on the Cisco Catalyst 4000/4500 switches
Last Reply 6 years 10 months ago.
262
0.0
0 TCC_2
The %SUPQ-4-CPUHB_RECV_STARVE: Still seeing receive queue stuck after throttling error message is displayed in the logs of Cisco Catalyst 2970, Catalyst 3560, or Catalyst 3750 Metro series switches running Cisco IOS System Software
Last Reply 1 year 2 months ago.
8687
0.0
1 TCC_2
The %SIBYTE-CFC3-6-SB_RMON_OVRFL: RMON register 20 overflow on mac 1 error message receieved in Catalyst 6500 series switches that runs Cisco IOS system software
Last Reply 6 years 10 months ago.
1817
0.0
0 TCC_2
An active Supervisor Engine 720 crashes after a redundant supervisor is inserted in Catalyst 6500 and Catalyst 7600 series switches
Last Reply 6 years 10 months ago.
876
0.0
0 TCC_2
How to get the heat tolerance and environment monitoring on a Catalyst 6500/6000 series switches
Last Reply 4 years 9 months ago.
525
0.0
1 TCC_2
The "%C6KENV-SP-4-FANPSINCOMPAT: Fan tray and power supply 1 are incompatible error message appears in Catalyst 6500 series switches that runs the Cisco IOS system
Last Reply 6 years 10 months ago.
2060
0.0
0 TCC_2
Ports go into err-disable with the %PHY-4-SFP_NOT_SUPPORTED: error message when connecting Catalyst 3560 and Catalyst 3750 Switches using an SFP Interconnect Cable
Last Reply 6 years 10 months ago.
2925
0.0
0 TCC_2
How to remove or erase unused port channel configs in the Catalyst 6500 that runs the CatOS system software
Last Reply 6 years 10 months ago.
1573
0.0
0 TCC_2
How to configure SPAN and RSPAN on Cisco Catalyst 4500 switches that run Cisco IOS Software
Last Reply 6 years 10 months ago.
11923
0.0
0 TCC_2
User receives periodic %SPANTREE-3-PORTDEL_FAILNOTFOUND syslog messages
Last Reply 6 years 10 months ago.
661
0.0
0 TCC_2
The %SYS-4-P2_WARN: 1/Blocked queue (tx) on port error message is displayed on a Cisco Catalyst 4000 series switch running CatOS
Last Reply 6 years 10 months ago.
483
0.0
0 TCC_2
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 year 2 weeks ago.
9076
0.0
1 TCC_2
How to enable/disable SPAN reflector feature in Catalyst 6500 series switches with the FWSM module
Last Reply 3 years 4 months ago.
4389
0.0
0 TCC_2
Ping issues between service modules and the rest of the network with cross-module etherchannel in Catalyst 6500 Series Switches with Supervisor 720 that runs native Cisco IOS
Last Reply 6 years 10 months ago.
465
0.0
0 TCC_2
A self-signed certificate is added to a Cisco Catalyst switch that is managed through HTTPS
Last Reply 6 years 10 months ago.
2224
0.0
0 TCC_2
Filter Results
Subject Views Ratingsort descending Comments Author
blog MPLS Conference 2010 and Cisco Leadership
Last Reply 5 years 6 months ago.
3134
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0 mmorrow
blog Cloud Computing: Update ITU-T Focus Group and OMG-Hosted Telecom Cloud Conference
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1560
0.0
2 mmorrow
blog From Internet of Things to Web of Things
Last Reply 5 years 4 months ago.
2553
0.0
0 mmorrow
blog FabricPath: Cisco’s New Technology of Extending Layer 2 Network Without Spanning Tree
Last Reply 5 years 4 months ago.
3277
0.0
0 TS-newsletter
blog Machine-to-Machine Communications as a Subset of Internet of Things
Last Reply 4 years 9 months ago.
2109
0.0
0 mmorrow
blog Troubleshooting L2 issues - ARP Poisoning
Last Reply 4 years 4 months ago.
8843
0.0
4 rparames
blog Upcoming Webcast: Troubleshooting Tools to Analyze High CPU Utilization Issues on Cisco Catalyst 6500 Series Switches
Last Reply 4 years 4 months ago.
1661
0.0
0 ciscomoderator
blog Chalk Talk: The Secret to Successful QoS Deployments: A Well-Defined End-to-End QoS Strate
Last Reply 2 years 2 months ago.
344
0.0
0 Julie Burruss
blog Cisco WCCP with Bluecoat (Multicast mode)
Last Reply 2 years 4 weeks ago.
141
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0 vishal_2007
blog Upcoming Ask the Expert Event with Cisco Designated VIP Marwan Al-shawi May 12-23
Last Reply 2 years 2 weeks ago.
142
0.0
0 Francine Richards
blog License Activation on 4500
Last Reply 1 year 7 months ago.
1153
0.0
1 sheraz butt
blog Three Tips for a Successful Review Period
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0 marobbs
blog Network Compliance Analysis
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blog Expert Insights: Network Optimization
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blog Prepare for the Collector
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blog Who Should Attend The Kickoff Meeting?
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blog Network Optimization: The 90-Day Plan
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blog Collector Security
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blog Spanning Tree Protocol, from a feature CCNA´s Perspective, by Gerald C. Paciello
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blog IPv6 for future CCNAs – Part II
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238
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blog Catalyst 3850 and 4500 compatibility with power supply Phase-phase in IT mode
Last Reply 1 month 2 days ago.
4
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blog Catalyst 3850 and 4500 compatibility with power supply Phase-phase in IT mode
Last Reply 1 month 2 days ago.
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blog IPv6 for future CCNAs (+) – Final Part.
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blog SWITCH configuration
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blog Converting IOS to CatOS in Production Switch
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3.0
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