topic Re: Layer 2 extension for DCI and Application Load Balancing in Application Networking https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523287#M31333 <HTML><HEAD></HEAD><BODY><P>Yes, that is correct. You need a direct L2 connectivity over a dedicated VLAN for ACE FT communication. Of course, client and server facing VLAN need to be at both DCs as well.</P></BODY></HTML> Sat, 16 Oct 2010 23:03:57 GMT Ivan Kovacevic 2010-10-16T23:03:57Z Layer 2 extension for DCI and Application Load Balancing https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523286#M31332 <P>Given a layer 2 extension has been provided between two dispersed data centers, placing two ACE load balancers (one at each DC) configured for high availability -I understand all you need is to share a common Vlan which will be extended across the two DC's- is this a recommended setup to provide for active/active data centers? I appreciate any comments.</P> Fri, 15 Oct 2010 13:45:48 GMT https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523286#M31332 Borman Bravo 2010-10-15T13:45:48Z Re: Layer 2 extension for DCI and Application Load Balancing https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523287#M31333 <HTML><HEAD></HEAD><BODY><P>Yes, that is correct. You need a direct L2 connectivity over a dedicated VLAN for ACE FT communication. Of course, client and server facing VLAN need to be at both DCs as well.</P></BODY></HTML> Sat, 16 Oct 2010 23:03:57 GMT https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523287#M31333 Ivan Kovacevic 2010-10-16T23:03:57Z Re: Layer 2 extension for DCI and Application Load Balancing https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523288#M31334 <HTML><HEAD></HEAD><BODY><P>Thanks Ivan, still wondering if this a common practice or a cisco's "validated design" , have you seen this configuration with active/active DC's?</P></BODY></HTML> Mon, 18 Oct 2010 14:18:14 GMT https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523288#M31334 Borman Bravo 2010-10-18T14:18:14Z Re: Layer 2 extension for DCI and Application Load Balancing https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523289#M31335 <HTML><HEAD></HEAD><BODY><P>I am not sure which part is confusing you. Is it becuse the DCs are geographically spread apart? Or because it is Active/Active? Or is it the fact you need a dedicated VLAN for FT data? How else would you do it? So which part of the puzzle doesn't seem right for you?</P></BODY></HTML> Mon, 18 Oct 2010 14:56:11 GMT https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523289#M31335 Ivan Kovacevic 2010-10-18T14:56:11Z Re: Layer 2 extension for DCI and Application Load Balancing https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523290#M31336 <HTML><HEAD></HEAD><BODY><P>Thanks again for your opinion, I mean the fact that the two DC's are geographically dispersed, I haven't come across any "real world" enviroments that leverage their extended layer 2 capabilities to run active-active ACE load balanced server VLANS.</P></BODY></HTML> Mon, 18 Oct 2010 15:08:59 GMT https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523290#M31336 Borman Bravo 2010-10-18T15:08:59Z Re: Layer 2 extension for DCI and Application Load Balancing https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523291#M31337 <HTML><HEAD></HEAD><BODY><P>Ah, ok. I was involved in some similar setups for some big customers and it worked just fine. As long as the ACEs see each other over a broadcast medium (needed because heartbeats are broadcasted) in a dedicated VLAN (needed to prevent anything interfering with the communication) the ACEs don't care if the other one is in the next rack or 100km away.</P></BODY></HTML> Mon, 18 Oct 2010 15:32:11 GMT https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523291#M31337 Ivan Kovacevic 2010-10-18T15:32:11Z Re: Layer 2 extension for DCI and Application Load Balancing https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523292#M31338 <HTML><HEAD></HEAD><BODY><P>Thanks! Very helpful.</P></BODY></HTML> Mon, 18 Oct 2010 15:46:13 GMT https://community.cisco.com/t5/application-networking/layer-2-extension-for-dci-and-application-load-balancing/m-p/1523292#M31338 Borman Bravo 2010-10-18T15:46:13Z