Re: Cisco Nexus oversubscription question

Jamal, the M132 has a 4/1 ratio which means 1,3,5,7 share a 10g. Each port would be limited to 2.5g max regardless of the access rate or SFP speed being set at 10g. If you want full line rate you will have to put port 1 in mode dedicated and ports 3,5,7 will automatically be forced down. Newer models support full line rate 10g on all ports if they came out, not sure if the 48p 10g M2 modules came out or not.

Regards,
 Joe Sanchez

( please excuse the brevity of this email as it was sent via a mobile device. Please excuse misspelled words or sentence structure.)

On Mar 4, 2013, at 5:57 AM, Naufal Jamal <naufalccie_at_yahoo.in> wrote:

> Hi,
>
> I have a nexus 7K with module N7K-M132XP-12L. This module has 32 10G
> ports but can give you only 80G throughput from the card since the ports are
> in shared mode. So that means i will have a port-group of 1,3,5,7 and can use
> either one of them with full 10G capacity or use 4 of them sharing 10G among.
> Lets see a port-group 13/1,13/3,13/5,13/7
>
> XYZ# sh int eth13/1 capabilities
> Ethernet13/1
> Model: N7K-M132XP-12L
> Type (SFP capable):
> 10Gbase-SR
> Speed: 10000
> Duplex: full
>
> Channel: yes
> Flowcontrol: rx-(off/on),tx-(off/on)
>
> Rate mode: dedicated/shared
>
> All other ports in the port-group
> don't have any SFP connected. We dont have any command saying "rate-mode
> dedicated" in any of the ports in the port-group.
>
> interface Ethernet13/1
> no
> switchport
> channel-group 13 mode active
> no shutdown
>
> port-channel 13 is
> L3. Does the L2 or L3 really matters when it comes to dedicate/shared mode in
> nexus?
>
> Is 13/1 getting the complete dedicated 10G wire speed even if we
> havent explicitly configured rate-mode in any of the ports?
>
> what happens if i
> connect anything to 13/3 does the 10G gets divided into 2 ports automatically?
> Just want to check without configuring the rate-mode in any of the ports does
> 10G gets allocated to a single port automatically given that the rest of the
> ports in the group are disabled?
>
>
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Received on Mon Mar 04 2013 - 08:08:04 ART