I'm setting up an etherchannel group to our Lefthand Network SAN. Looking at the design of our 4510R switch and line cards, they are grouped into 6 groups of 8 to the fiber at 1G. Is there a best practice to achieve optimal performance for all servers, workstations attached to the switch? Should I split the conections up on differeny line cards? all on the same? in the same group? Any help would be appriciated.
Which blades are you looking at specifically. Cisco do docs on each blade that shows the port groupings just in case you weren't aware of them. So for example:
the WS-X4418-GB blade
Ports 1 & 2 are uncontended gigabit
Then there are 16 gigabit ports which are oversubscribed and are grouped as follows:
Ports 3, 5, 7, 9
•Ports 4, 6, 8, 10
•Ports 11, 13, 15, 17
•Ports 12, 14, 16, 18
So you need to know how the groupings are done to ensure you are using the throughput to the maximum. Even if you are fully populating the blades you can still ensure that a busy critical server is placed with 2 or 3 less important and less busy servers within the same group.
As far as etherchannels go. I would recommend splitting it across blades for throughput but more importantly redundancy.
i happen to have WS-X6148-GE-TX module and i would have LOVED to port-channel multiple gig ports together for a greater throughput. but....
The WS-X6548-GE-TX, WS-X6548V-GE-TX, WS-X6148-GE-TX, and WS-X6148V-GE-TX modules have a limitation with EtherChannel. EtherChannel is supported on these modules for all configurations (10, 100, and 1000 Mbps speeds) but be aware of these cases of oversubscription when you configure these modules:
On these modules there is a single 1-Gigabit Ethernet uplink from the port ASIC that supports eight ports. For EtherChannel, the data from all links in a bundle goes to the port ASIC, even though the data is destined for another link. This data consumes bandwidth in the 1-Gigabit Ethernet link. For these modules, the sum total of all data on an EtherChannel cannot exceed 1 Gigabit.
You receive a message on the maximum throughput when you add a port of this module to EtherChannel.
C6500> (enable) set port channel 3/5,4/5 mode on
Adding a WS-X6148-GE-TX port to a channel limits the channel's
I'm using the X4548-GB Line Cards and supervisor engin V. If i use 802.3ad doesnt' that in turn "increase" bandwidth to my equipment? I want to make sure I place the cables in the correct ports to get best preformace out of the switch
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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