topic Re: Dual-homed server to two Cat4948 switches in Server Networking https://community.cisco.com/t5/server-networking/dual-homed-server-to-two-cat4948-switches/m-p/1491015#M4574 <HTML><HEAD></HEAD><BODY><P>The exact load sharing options available to you will probably depend on the server type / vendor. The settings are applicable to the Network Adapters but you usually use the configuration utility provided by the respective vendor. I would suggest you do a quick google search on your particular server model. An example is:</P><P></P><P><A href="http://www.brianmadden.com/blogs/guestbloggers/archive/2006/04/19/hp-proliant-network-adapter-teaming-explained.aspx">http://www.brianmadden.com/blogs/guestbloggers/archive/2006/04/19/hp-proliant-network-adapter-teaming-explained.aspx</A></P><P></P><P>Atif</P></BODY></HTML> Tue, 31 Aug 2010 15:47:58 GMT Atif Awan 2010-08-31T15:47:58Z Dual-homed server to two Cat4948 switches https://community.cisco.com/t5/server-networking/dual-homed-server-to-two-cat4948-switches/m-p/1491011#M4570 <P><IMG src="http://supportforums.cisco.com/sites/default/files/legacy/4/5/6/6654-Dual-homed%20server.png" alt="Dual-homed server.png" height="570" onclick="" width="464" /></P><P></P><P>Hello everyone,</P><P></P><P>I have a picture above which I want to realize. The main point is a dual-homed server connected to two switches.</P><P>At server OS needed to configure NIC teaming which uses LACP. But how I can do it at Catalyst 4948?</P><P>Which technology I able to use to multi-switch etherchannel?</P><P>If I need one more link between Cat4948, then I can do.</P> Fri, 27 Aug 2010 13:19:31 GMT https://community.cisco.com/t5/server-networking/dual-homed-server-to-two-cat4948-switches/m-p/1491011#M4570 Yury Makurin 2010-08-27T13:19:31Z Re: Dual-homed server to two Cat4948 switches https://community.cisco.com/t5/server-networking/dual-homed-server-to-two-cat4948-switches/m-p/1491012#M4571 <HTML><HEAD></HEAD><BODY><P>I do not believe you can accomplish this with 4948s. You need something along the lines of vPC (Nexus) or VSS (6500) to be able to do this as the upstream switch pair needs to behave as a single logical device for LACP. What you can do is run the server in Active/Standby mode or if you want better load distribution then something along the lines of Transmit load balancing (TLB) may work.</P><P></P><P>Atif</P><P></P><P></P><P>P.S: Stackable switches like 3750 should also allow you to do LACP across two switches.</P></BODY></HTML> Fri, 27 Aug 2010 16:13:38 GMT https://community.cisco.com/t5/server-networking/dual-homed-server-to-two-cat4948-switches/m-p/1491012#M4571 Atif Awan 2010-08-27T16:13:38Z Re: Dual-homed server to two Cat4948 switches https://community.cisco.com/t5/server-networking/dual-homed-server-to-two-cat4948-switches/m-p/1491013#M4572 <HTML><HEAD></HEAD><BODY><P>Correct, you can have Active/Passive, but no dual homed with active / active unless you have Nexus devices or VSS capable Cat6k.</P><P>However in this diagram, if you can bypass the 4948, then you can have active / active with vPC and connect the servers on the Nexus 7000s.</P></BODY></HTML> Fri, 27 Aug 2010 16:16:07 GMT https://community.cisco.com/t5/server-networking/dual-homed-server-to-two-cat4948-switches/m-p/1491013#M4572 Lucien Avramov 2010-08-27T16:16:07Z Re: Dual-homed server to two Cat4948 switches https://community.cisco.com/t5/server-networking/dual-homed-server-to-two-cat4948-switches/m-p/1491014#M4573 <HTML><HEAD></HEAD><BODY><P>Thank you for answers.</P><P></P><P>Atif, could you clarify at which layer to implement Active\Standy? At application layer? At OS layer? or Network cards?</P><P>And could you please give me link for description of TLB?</P></BODY></HTML> Tue, 31 Aug 2010 11:14:12 GMT https://community.cisco.com/t5/server-networking/dual-homed-server-to-two-cat4948-switches/m-p/1491014#M4573 Yury Makurin 2010-08-31T11:14:12Z Re: Dual-homed server to two Cat4948 switches https://community.cisco.com/t5/server-networking/dual-homed-server-to-two-cat4948-switches/m-p/1491015#M4574 <HTML><HEAD></HEAD><BODY><P>The exact load sharing options available to you will probably depend on the server type / vendor. The settings are applicable to the Network Adapters but you usually use the configuration utility provided by the respective vendor. I would suggest you do a quick google search on your particular server model. An example is:</P><P></P><P><A href="http://www.brianmadden.com/blogs/guestbloggers/archive/2006/04/19/hp-proliant-network-adapter-teaming-explained.aspx">http://www.brianmadden.com/blogs/guestbloggers/archive/2006/04/19/hp-proliant-network-adapter-teaming-explained.aspx</A></P><P></P><P>Atif</P></BODY></HTML> Tue, 31 Aug 2010 15:47:58 GMT https://community.cisco.com/t5/server-networking/dual-homed-server-to-two-cat4948-switches/m-p/1491015#M4574 Atif Awan 2010-08-31T15:47:58Z