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 Not getting netflow from router 2921 through the firewall
Last Reply 2 min 4 sec ago.
0 0 0 1 Karsten Iwen
discussion VRRP configuration
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44 0 0 11 mark malone
discussion Configuration on cisco 1924 switch.
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9 0 0 3 mark malone
discussion NTP Invalid insane
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27 0 0 1 Philip D'Ath
discussion Cisco Catalyst 4003 does it have dual power capability?
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0 0 0 2 engr.perez
discussion How to connect Nexus 2000 with MPO breakout cable
Last Reply 32 min 51 sec ago.
0 0 0 0 g8104
discussion CISCO C3750X DHCP issue
Last Reply 42 min 41 sec ago.
1 0 0 2 Vladimir Bednikov
discussion 4510R+E VSS IOS Upgrade
Last Reply 47 min 4 sec ago.
15 0 5 5 Leo Laohoo
discussion Cisco 3925 Power cutover one by one
Last Reply 57 min 3 sec ago.
0 0 0 4 Jerry Jiang
discussion Cisco 867VAE-K9 router rip
Last Reply 1 hour 1 min ago.
10 0 0 1 Philip D'Ath
discussion Dot1Q VLAN Tagging in WAN Circuit
Last Reply 1 hour 4 min ago.
2 0 0 1 Philip D'Ath
discussion dns lookups in guest vlans
Last Reply 4 hours 3 min ago.
20 0 0 5 jkay18041
discussion 2 Lan 2 Wan..... problem.
Last Reply 6 hours 45 min ago.
90 0 0 14 erdosain99
discussion Problem uploading ios into 2960x switch using xmodem.
Last Reply 9 hours 31 min ago.
16 0 0 5 Leo Laohoo
discussion bad mask
Last Reply 9 hours 32 min ago.
734 0 5 3 hug7770011
discussion how to know ospf unlearned prefix details.
Last Reply 9 hours 32 min ago.
0 0 0 2 Reza Sharifi
discussion ip directed-broadcast over GRE?
Last Reply 10 hours 59 min ago.
29 0 0 6 Richard Burts
discussion Connect Nexus 3548 to Nexus 6001 with QSFP-4SFP10G-CU5M
Last Reply 13 hours 39 min ago.
182 0 0 4 [email protected]
discussion MLS QoS
Last Reply 13 hours 58 min ago.
0 0 0 0 dlongpre
discussion HSRP, RSTP, and Ether-Channel in Enterprise Campus design
Last Reply 14 hours 49 sec ago.
43 0 0 12 Paul Chapman
discussion 2960s stack irrgular reboot
Last Reply 15 hours 18 min ago.
1 0 0 1 Reza Sharifi
discussion ROUTE-MAPS on CATALYST 2960X
Last Reply 15 hours 35 min ago.
0 0 0 2 fperez001111
discussion L3DONTBNDL2: Te2/5 suspended: LACP currently not enabled on the remote port
Last Reply 16 hours 45 min ago.
9 0 5 4 Angelo Cacciapuoti
discussion Route Filtering and Redistribution in OSPF in Nexus 7K
Last Reply 17 hours 24 min ago.
30 0 0 8 supportlan
discussion Auto Smartport Macro execution via Cisco ACS
Last Reply 18 hours 12 min ago.
19 0 0 4 Chris
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
14 tahirshabbir
3850: Understanding interface configuration on NM modules
Last Reply 1 month 2 weeks ago.
40120
5.0
16 Richard Primm
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.
141
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
0.0
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
Last Reply 1 month 3 weeks ago.
924
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0 Gerald C. Paciello
blog How do etherchannel HASH algorithm works and LOAD DISTRIBUTION happen?
Last Reply 5 months 3 weeks ago.
28680
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blog Collector Security
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blog Who Should Attend The Kickoff Meeting?
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58
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blog Network Optimization: The 90-Day Plan
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76
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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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57
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0 marobbs
blog Three Tips for a Successful Review Period
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53
0.0
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blog Nexus 7000 ACL logging (OAL)
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19886
5.0
8 Robert Taylor
blog Active /Active Internet Load balancing with High availability ( AS Prepend Path)
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270
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0 Ganesh Hariharan
blog Output drops due to QoS on 2960/3560/3750 switches
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30034
5.0
1 Shashank Singh
blog License Activation on 4500
Last Reply 1 year 7 months ago.
1149
0.0
1 sheraz butt
blog Nexus 7000 and IOS OSPF Loop Prevention and Interoperability
Last Reply 1 year 7 months ago.
7969
5.0
7 Robert Taylor
blog How to build the topology of an OSPF area
Last Reply 1 year 10 months ago.
3373
5.0
5 Aninda Chatterjee
blog Booting Cisco Router from a TFTP server
Last Reply 1 year 10 months ago.
24939
5.0
3 ajaju
blog Configuring a frame-relay switch
Last Reply 2 years 1 week ago.
8844
5.0
7 Aninda Chatterjee
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