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 HWIC-4ESW module configuration
Last Reply 6 min 7 sec ago.
6 0 0 3 aakim_1982
discussion LAN ping latency high going more then 1ms
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discussion HSRP, RSTP, and Ether-Channel in Enterprise Campus design
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11 0 0 11 willwetherman
discussion VRRP configuration
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38 0 0 9 mark malone
discussion No DHCP crossing over trunk
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40 0 0 12 mark malone
discussion Cisco 7960 IP Phone registers, but doesn't receive a number
Last Reply 1 hour 30 min ago.
0 0 0 0 [email protected]
discussion Route Filtering and Redistribution in OSPF in Nexus 7K
Last Reply 1 hour 46 min ago.
24 0 0 6 venkateshwarlu.t
discussion Span port on N2k - Where are the packets duplicated
Last Reply 2 hours 35 min ago.
0 0 0 0 Wolfgang Stindl
discussion show crypto isakmp sa shows wrong source in spoke and physical ip
Last Reply 2 hours 36 min ago.
0 0 0 0 jolinchewjb
discussion Troubleshooting a switch to switch connection issue
Last Reply 2 hours 51 min ago.
64 0 0 14 Process153
discussion How to installed standalone 3850 switch from Bundle to Install mode
Last Reply 3 hours 16 min ago.
2024 0 5 3 armir1234
discussion command ip dhcp class not supported
Last Reply 3 hours 31 min ago.
0 0 0 0 Luiz Veneziani
discussion Is there a specific command to show the queue buffer size of one port-group on WS-X6904-40G?
Last Reply 3 hours 51 min ago.
14 0 0 5 Assassin.X
discussion DMVPN can't be done for ssecond spoke in GNS3
Last Reply 4 hours 6 min ago.
11 0 0 2 jolinchewjb
discussion Problem uploading ios into 2960x switch using xmodem.
Last Reply 4 hours 43 min ago.
3 0 0 4 krishna murthy
discussion Cisco 2821 Not able to access CLI - both Telnet & console connections failed
Last Reply 4 hours 50 min ago.
4 0 0 4 [email protected]
discussion ipv6 between Cisco 1841 & Cisco 1811
Last Reply 5 hours 36 min ago.
19 0 0 7 Andrew.Ghorev
discussion VRRP Problem
Last Reply 6 hours 22 min ago.
11 0 0 4 Petri Kemppainen
discussion Regarding BGP Issue
Last Reply 6 hours 42 min ago.
0 0 0 0 akash.deep
discussion dns lookups in guest vlans
Last Reply 8 hours 18 min ago.
7 0 0 2 jkay18041
discussion Packet size setting
Last Reply 11 hours 15 min ago.
35 0 0 7 Carlos Villagran
discussion Is C3850-NM-2-10G compatible with WS-C3750X-48T-L switch?
Last Reply 11 hours 26 min ago.
9 0 5 5 Leo Laohoo
discussion which command can see the number of duplicate ack
Last Reply 12 hours 39 min ago.
9 0 5 3 saif musa
discussion Catalyst 3750-48-TS won't allow console input after image upgrade
Last Reply 15 hours 39 min ago.
0 0 0 0 lboogie25
discussion Switch trunking mode
Last Reply 17 hours 31 min ago.
3 0 0 3 Furose M
Filter Results
Subject Views Rating Comments Author
Importance of BPDU Guard and BPDU Filter !!
Last Reply 5 hours 15 min ago.
144594
4.7
14 Ganesh Hariharan
Nexus - vPC Recommendations
Last Reply 1 day 19 hours ago.
28405
5.0
6 pnagpal
Troubleshooting tips for 3750X Stack power feature
Last Reply 1 week 8 hours ago.
19798
4.3
6 pnagpal
Webcast Slides: Cisco Catalyst 2960-X and 2960-XR Series Switches Overview, Configuration,
Last Reply 1 week 3 days ago.
115
5.0
0 roor
Webcast FAQs: Catalyst 2960X & 2960XR Switches Overview, Configuration and Troubleshooting
Last Reply 1 week 3 days ago.
0
0.0
0 roor
DHCP listener
Last Reply 1 week 5 days ago.
0
0.0
0 netbeginner
3850 switch - IOS XE upgrade Detailed (standalone)
Last Reply 1 week 5 days ago.
16063
5.0
18 Furose M
Understanding MSFC, PFC and DFC roles in Catalyst 6500 Series Switch
Last Reply 1 week 6 days ago.
61184
5.0
15 SunilKhanna
How to use Time-Domain Reflectometer (TDR)
Last Reply 1 week 6 days ago.
101216
5.0
93 Leo Laohoo
virtual switching system (vss) español
Last Reply 2 weeks 3 days ago.
4
0.0
0 jmp780718
CCNP Switching Notes Español
Last Reply 2 weeks 3 days ago.
5
0.0
0 jmp780718
Easy Traffic Generator (Works with GNS3)
Last Reply 3 weeks 7 hours ago.
0
0.0
0 Carlos Villagran
NXOS Log Finder Tool for Nexus Switches
Last Reply 3 weeks 10 hours ago.
53
4.5
0 aeguiart
Understanding Ethernet Virtual Circuits (EVC)
Last Reply 3 weeks 1 day ago.
315060
5.0
46 plumbis
Changing a Switch Member Number in a 3850 Stack
Last Reply 3 weeks 3 days ago.
0
0.0
0 Carlos Villagran
Catalyst 4500 CPU Packet Buffer Parser
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3
0.0
0 aeguiart
Cisco CatOS vs. IOS Commands
Last Reply 1 month 12 hours ago.
1
0.0
0 Daniel Vieceli
Route to Host Stuck on Switch
Last Reply 1 month 2 days ago.
3403
5.0
5 Adrian Martinez
What’s New on Cisco Catalyst 6500 Series? - FAQ from Live Webcast
Last Reply 1 month 2 weeks ago.
306
0.0
1 ashirkar
How to Form a Catalyst 3850 Data-Stack and Power-Stack
Last Reply 1 month 2 weeks ago.
2535
5.0
4 Luis Villanueva Brito
Recognize the purpose & functions of various network devices:Router, Switch, Hub & Bridge.
Last Reply 1 month 2 weeks ago.
40
0.0
0 Gerald C. Paciello
What is the difference between an IP base image and an IP services image
Last Reply 1 month 2 weeks ago.
214153
5.0
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3850: Understanding interface configuration on NM modules
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40120
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LICENSING on 2900/3500/3700
Last Reply 1 month 2 weeks ago.
23209
0.0
5 ranraju
Does cisco 2921 ip base supports nat and static route ....can any one please advise
Last Reply 2 months 1 week ago.
20
0.0
3 mohdayaz1981
Filter Results
Subject Views Rating Comments Author
blog SWITCH configuration
Last Reply 3 weeks 2 days ago.
19
0.0
0 julius78_baclaan1
blog IPv6 for future CCNAs (+) – Final Part.
Last Reply 1 month 6 hours ago.
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0.0
0 Gerald C. Paciello
blog Catalyst 3850 and 4500 compatibility with power supply Phase-phase in IT mode
Last Reply 1 month 1 day ago.
9
0.0
0
blog Catalyst 3850 and 4500 compatibility with power supply Phase-phase in IT mode
Last Reply 1 month 1 day ago.
4
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0
blog Loading an IOS on a switch via Xmodem
Last Reply 1 month 4 days ago.
79449
5.0
18 Aninda Chatterjee
blog How would a multicast be delivered with incongruent IP/MAC addressing?
Last Reply 1 month 1 week ago.
240
5.0
4 Peter Paluch
blog IPv6 for future CCNAs – Part II
Last Reply 1 month 1 week ago.
235
5.0
0 Gerald C. Paciello
blog IPv6 for future CCNAs – Part I
Last Reply 1 month 1 week ago.
353
4.0
1 Gerald C. Paciello
blog Spanning Tree Protocol, from a feature CCNA´s Perspective, by Gerald C. Paciello
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924
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0 Gerald C. Paciello
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
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blog Collector Security
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blog Who Should Attend The Kickoff Meeting?
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blog Prepare for the Collector
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blog Expert Insights: Network Optimization
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blog Network Compliance Analysis
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blog Three Tips for a Successful Review Period
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blog Nexus 7000 ACL logging (OAL)
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blog Active /Active Internet Load balancing with High availability ( AS Prepend Path)
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blog Output drops due to QoS on 2960/3560/3750 switches
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30034
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1 Shashank Singh
blog License Activation on 4500
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blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 1 year 7 months ago.
7969
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7 Robert Taylor
blog How to build the topology of an OSPF area
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3373
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blog Booting Cisco Router from a TFTP server
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blog Configuring a frame-relay switch
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