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Hello, Cisco Community!I’m really happy to share that I’ll be hosting the Cisco Community Lab Series, a brand-new hands-on learning journey designed to help you build practical networking skills step by step.Every Thursday at 8 PM EST, I’ll post a ne...

Hi,I have recetly  upgraded our core switches (6509E) to SUP 2T from 32. Each core has 2 SUP's (hot/standby). out of 4 SUP engines, one is defective. i had received the new SUP from cisco. Currently my core swicth 2 is running with single SUP. Can i ...

Hi,I've taken 2 4507's fresh out of the box running CAT4500E-ENTSERVICESK9-MZ.122-53.SG2.BIN which was upgraded from CAT4500E-IPBASEK9-MZ.122-53.SG2.BINI'm getting constant %C4K_S2W-4-WRITECALENDARERR:  Calendar write operation Failed errors on the c...

I used a router as a frame-relay , but the interface serial 0/0 protocol is always down , could any one please help me outhere is the config for itBuilding configuration...Current configuration : 1318 bytes!version 12.4service timestamps debug dateti...

Hi Everyone,Happy New Year!Say we have few Devices at Site A  running EIGRP.How can i tell which Router is EIGRP stub?By checking the configeigrp stub connected.Whoever device has above line we can confirm  it is stub router right?ThanksMAhesh

mahesh18 by Level 6
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We recently purchased a 48 port ws-c3750x to replace our older 3750 24 port. I loaded the config from the old to the new. Old is version 12.1....new is 12.2 For some reason the Vlans do not seem to be working on the new switch and I have no idea why....

                   I am trying to connect  my Cisco 2911 router to my community in CNA.  I can see the routers on the topology map, but when I try to add to community I get an error message stating that the router is unreachable (Unable to connect). ...

huffmanj by Level 1
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hi  ,im trying to understand the MLS operation .uptill now i understood that the MLS will work as a router if the port of the MLS configured as a router , and thwe MLS will work as switch if the port of the MLS configured as a switch .this is a confu...

Dr.X by Level 2
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Hi all! Thank you for reviewing my question. I hope you can help me out. I needed to create a few VLANs off of a Cat 4506. I inherited this LAN and it is configured poorly. I cannot overhaul it at this time so I am stuck working in this scenario. You...

Hello,I was wondering what has the biggest hit on the CPU of a L3 3750x switch:ACLs on an SVIVACLsPrivate VLANsOr do they all affect the CPU the same way. I was hoping perhaps one of these was done in hardware.Thanks!

Pete89 by Level 2
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Hello,In a one arm load-balancing configuration setup is it necessary to use source nat? or does the LB know what NAT needs to take place? It has knowledge that its in a one arm config as seen below (from the gui of the ACE)Take an example for instan...

Hi AllWe are facing a issue regarding with TCAM on ACL entries for one of the vlan. - VLAN ACL applied on 1 ,2 , 3 Vlans ,only users on 3rd Vlan are facing packet drop/slowness , after remove the ACL it’s working fine without packet drop.- Same ACL u...

we are using cisco 6509 series switches as core switches. and Cisco 4510,4507 series switches as edge switches. all the vlans are created at core switches and propogating to edge switches through VTP. we are using OSPF as routing protocol at core swi...