Actually, I just installed a 10G LR fiber optic module in each of them in order
to connect to the 5Ks.
I was sure to add the spanning-tree port type edge trunk command on the Nexus
so I didn't risk ISSU support.
The way I see it, we should be able to keep this working by making sure no
hosts
Haha. For our datacenter migration, we are traveling over about two miles of
singlemode fiber with the 10G links. (5 patches total!)
I know it's not best practice, but we are doing this to avoid having to
readdress servers during the live transition. Once the transition is complete,
the Nexus
Also, why LR optics? Unless you need to distance, SR optics are 1/4 the price.
Or if you are patching into the same rack, twinax cables even cheaper.
Ive generally placed 5k in a central location near core / aggregation switches,
then distributed the 2k over the data hall with multimode fibre.
Im assuming your 3560 has gigabit ports to connet the 5ks?
Then you can do jumbo frames on those interfaces, as per the following from
cisco.com
http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml#c3
You will need to reboot the switch
PMTUD should take care of the rest...
Andrew Jones
-Original Message-
From: Conkel, Joshua [mailto:conk...@wems-llc.com]
Sent: Saturday, 22 September 2012 10:47 AM
To: Andrew Jones
Cc: cisco-nsp@puck.nether.net
Subject: RE: Are Nexus and per-interface or FEX MTU settings possible?
Hi Joshua,
You can't set a per interface MTU on the Nexus 5500-series switches. However,
you can do it on per Class of Service.
So in order to do increased MTU for your iSCSI traffic, you should create a
policy-map identifying your iSCSI traffic, place the traffic in a separate
queue with
I'd like to further clarify this - as I think the subtleties here
between layer 2 and layer 3 MTU may be giving a misleading picture.
The Layer 2 MTU (AKA frame size) is set globally, in the same way as on
a Catalyst floor switch such as a 3560/3750 is done.
This is performed by something
On 09/20/2012 07:20 AM, Reuben Farrelly wrote:
policy-map type network-qos enable-jumbo-frames
class type network-qos class-default
mtu 9216
system qos
service-policy type network-qos enable-jumbo-frames
Interesting.
Does anyone know the rationale behind this way of setting the
We just bought a bundle of 2x 5548Ps and 20x 2248s in order to converge our
data and storage networks in our new datacenter. After carefully reading the
configuration limitations document and designing around the limitations for our
migration, we pulled the trigger and bought the material. The
