About milan.kulik

milan.kulik · 01-15-2015

Hi, does anybody know what happens exactly when a switch has noticed a particular MAC source address received on a new port while the original port did not come Down? The switch will send a "MAC address flapping between ports ...." error message to ...

milan.kulik · 01-08-2015

Hi, does anybody here have a practical experience with IPv6 implementing within a big corporate network? Let's say the corporate has got several thousands of sites, some of them in Europe, others in Asia and Americas. 20 Data Centers are used for th...

milan.kulik · 10-10-2014

Hello, I've got following scenario inherited:Two routers R1 and R2 running GLBP round robin mode currently.Three clients (C1, C2, C3) only.All the clients are Up all the time sending data through the GLBP virtual IP address used as their default GW.T...

milan.kulik · 09-10-2014

Hello, I'm configuring a CISCO1921 router as a teminal server at the moment.I used http://routing-bits.com/2008/09/30/cisco-terminal-server-with-menu-command/as a config template and it works.I just added ssh to access the router instead of Telnet. ...

milan.kulik · 03-26-2014

Hi, I installed Cisco IP Communicator 8.6.1.0 on my Win7 machine recently.It works fine but one thing is confusing me:I tried to capture packets by Wireshark during some troubleshooting.And realized:Most of the time RTP packets are sent with DSCP=0 b...

milan.kulik · 02-26-2021

Hi Peter, as usually, Cisco can say "It's not a bug, it's a feature!"But it's a pretty confusing feature... Let me give you an example on a switch running an old IOS 12.2(55)SE10:sw0(config)#access-l 66 permit 10.10.10.1sw0(config)#access-l 66 permit...

milan.kulik · 03-14-2019

See a thread from 2003 here: https://community.cisco.com/t5/other-network-architecture/cdp-4-native-vlan-mismatch/td-p/193791 Degrading CDP to ver1 is a softer solution. BR, Milan

milan.kulik · 03-14-2019

Hi, if you simply prepend AS1 once to all prefixes advertised towards AS2, AS4 should prefer the path through AS3. As long as AS2 and AS3 are not peering directly, everything would work fine. In a case AS2 and 3 would be peering, you would need som...

milan.kulik · 11-23-2018

Hi, have you found the solution? I believe I've got one but it's quite complex, so I'd like to know if something easier would be available. Thanks, Milan

milan.kulik · 03-01-2018

Possibly proxy ARP was enabled somewhere in the past "fixing" the wrong mask issue? BR, Milan

Member Since	‎10-30-2001 01:17 AM
Date Last Visited	‎08-14-2023 05:58 AM
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MAC move causing a 5-minute unicats flood?

IPv6 in a big corporate

GLBP host-dependent details

reverse telnet additional login required

When does Cisco IP Communicator set DSCP to EF?

Re: Access-list wrong order

Re: CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch

Re: Influence inbound traffic routing with BGP AS_Path prepend based upon source AS

Re: Prime 3.1.5 - compliance audit - how to check Order of Access-List

Re: Possible Routing Issue