depends on how you design your HA... HA requires redundancy... in your situation you have two possible scenarios... assuming you have two switches and two severs with two nics for each server and lets us name them with the followings...
switches: switch1 and switch2 servers: server1 and server2 nics: server1-nic1, server1-nic2, server2-nic1 and server2-nic2 scenario 1: server1-nic1 and server1-nic2 connected to switch1 server2-nic1 and server2-nic2 connected to swtich2 switch1 and switch2 trunk each other scenario2: server1-nic1 connected to switch1 and server1-nic2 connected to switch2 server2-nic1 connected to swtich1 and server2-nic2 connected to switch2 switch1 and switch2 stack each other scenario1 and scenario2 are using LACP for channel bonding of your servers.. scenario1 doesn't need to stack your switch (eg. Cisco StackWise technology)... when one switch died.. you still have one switch and one server active with the bandwidth capacity of two nics for that server scenario2 needs to stack your switch... when one switch died.. you still have one switch and two servers active with the bandwidth capacity of one nic for each server... trunking and stacking switches are two different thing...in trunking, two or more physical switches that are connected have a management IP each one of them and port channeling (LACP) cannot across on the other side of the switch.. in stacking, two or more physical switches turns into one big physical switch.. which means you only have one management IP and you can select any ports to any switches in a stack for port channeling (LACP).. both scenarios are offering HA but depends which scenario suited for your needs.... for scenario1, a low end switch is already enough as long as it supports 802.3ad (LACP).. for scenario2, you need (normally a high end) switch that supports both 802.3ad and stacking technology.. if you are looking for scenario2, you can start with Cisco 3570-E or 3570-X series.. but of course as what i said... it depends on your switching capacity, stacking bandwidth and budget... fooler. On Thu, Jul 17, 2014 at 9:47 PM, Michael Tinsay <tinsa...@yahoo.com> wrote: > Thanks Fooler and Marvin. > > What I'm looking for is first-hand experience, because the resellers can't > seem to provide a POC. > > > --- mike t. > > ________________________________ > From: Marvin Pascual <bin...@gmail.com> > To: Philippine Linux Users' Group (PLUG) Technical Discussion List > <plug@lists.linux.org.ph> > Cc: Michael Tinsay <tinsa...@yahoo.com> > Sent: Tuesday, 15 July 2014, 12:46 > Subject: Re: [plug] Cross-stack LACP > > Fooler mentioned it already. Juniper has a Virtual Chassis and Cisco has a > StackWise. They should be LACP friendly. Your LACP'ed copper cables can > connect to different physical switches on the stack. > > > > > On Thu, Jul 10, 2014 at 6:41 AM, fooler mail <fooler.m...@gmail.com> wrote: > > cisco, juniper, hp and other big players are offering with your > needs... it really depends on your switching capacity, stacking > bandwidth and budget... > > fooler. > > On Tue, Jul 8, 2014 at 8:44 PM, Michael Tinsay <tinsa...@yahoo.com> wrote: >> Hello pluggers! >> >> For the past year (give or take a couple of months), I've been using >> moosefs >> as an inexpensive SAN/NAS solution. It provides some level of HA on the >> storage side. Now I'm looking at complementing it with some measure of HA >> on the network side of the infrastructure. >> >> I'm looking for info on what switches (brand + model) are in use out there >> that do cross-stack link aggregation/bonding. I'd like to hear from those >> who are actually using such a setup. We've been asking various resellers >> for a POC, but all of them say they can't because the neither they nor >> their >> distributor carry demo units. >> >> TIA! >> >> >> --- mike t. >> >> _________________________________________________ >> Philippine Linux Users' Group (PLUG) Mailing List >> http://lists.linux.org.ph/mailman/listinfo/plug >> Searchable Archives: http://archives.free.net.ph > _________________________________________________ > Philippine Linux Users' Group (PLUG) Mailing List > http://lists.linux.org.ph/mailman/listinfo/plug > Searchable Archives: http://archives.free.net.ph > > > > > -- > MARVIN T. PASCUAL > PGP Key: 0x6573944F > E-Mail and SIP: mar...@pascual.com.ph > +63 2 7386514 (Philippines) > +65 64049250 (Singapore) > +44 844 4841732 (UK) > +1 206 3095289 (USA) > > _________________________________________________ > Philippine Linux Users' Group (PLUG) Mailing List > http://lists.linux.org.ph/mailman/listinfo/plug > Searchable Archives: http://archives.free.net.ph > > > > _________________________________________________ > Philippine Linux Users' Group (PLUG) Mailing List > http://lists.linux.org.ph/mailman/listinfo/plug > Searchable Archives: http://archives.free.net.ph _________________________________________________ Philippine Linux Users' Group (PLUG) Mailing List http://lists.linux.org.ph/mailman/listinfo/plug Searchable Archives: http://archives.free.net.ph
