ā02-19-2010 01:39 PM - edited ā03-06-2019 09:48 AM
Will data transfers stay local to a non-core switch when running native IOS?
If host A needs to download 15gigs of data from host B and they are both on SW2, will all the traffic pass through the core switch, or just the initial lookup until cached on SW2? With CATOS and MLS the traffic would stay local to SW2. Similary if host A was on S2 and host b on SW3.
ā02-19-2010 03:15 PM
Mikamus07 wrote:
Will data transfers stay local to a non-core switch when running native IOS?
If host A needs to download 15gigs of data from host B and they are both on SW2, will all the traffic pass through the core switch, or just the initial lookup until cached on SW2? With CATOS and MLS the traffic would stay local to SW2. Similary if host A was on S2 and host b on SW3.
Are host A and B in the same vlan ?
If they are then traffic should stay local to SW2. If they aren't then traffic will have to go via the L3 vlan interface on SW1.
As for A on SW2 and B on SW3. If the disrtibution switches are interconnected to each other with a L2 trunk and A & B are in same vlan then traffic will not have to go via core switch. If they are in different vlan then traffic will have to go via core switch.
It all depends on whether the traffic an be switched ie. they are in the same vlan or routed ie. they are in different vlans.
Jon
ā02-19-2010 03:16 PM
I believe If both hosts are on the same switch, in the same broadcast domain (vlan) then the MSFC will take of that locally since the switch got the MAC addresses in it CAM table,, no need to get the Core switch involved..
ā02-19-2010 03:23 PM
francisco_1 wrote:
I believe If both hosts are on the same switch, in the same broadcast domain (vlan) then the MSFC will take of that locally since the switch got the MAC addresses in it CAM table,, no need to get the Core switch involved..
Francisco
If the 2 devices are in the same subnet then the MSFC shouldn't come into it at all because the MSFC is concerned with L3 lookups not L2.
Jon
ā02-22-2010 07:09 AM
Jon,
Actually there is something else i need to ask you regarding this subject offline.
Can you please send me your email address.
My email is franco.isaac@btinternet.com.
Thanks
Francisco
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: