Israel,
You should just need to adjust your QoS policy to permit the jumbo frames
which I believe you have already done.
Then on the 6500 side you should just need to adjust it on the port-channel
going towards the 5k's and that will pass it along to the physical
interfaces that are members on both 6500's of the VSS.
We have a couple data centers where we use jumbo frames with some ExaData
setups, along with Data Domains at each site doing replication across some
10gb WAN links, and all that uses jumbo between the ExaData and between
sites.
If you have to push the jumbo frames between subnets just remember to
enable the jumbo frames on the SVI's also as it comes/goes out of the
vlan.
A best practice I use is typically to set the MTU as 9100 to ensure no one
tries to use a payload larger than 9000-bytes, because if you start using
OTV or other features down the road that add additional overhead, or even
just an IP header itself, all that will cut into the "9216" max that exists.
You can check the 5k's with "show queuing interface eth x/x" because the
"show int" MTU doesn't properly list it, no matter what code version you
are on:
show que int eth 1/47 | inc MTU
q-size: 469760, HW MTU: 9216 (9216 configured)
Thanks,
Eric Day
CCIE #43451 Data Center
[email protected]
On Thu, Jul 24, 2014 at 12:57 PM, Rob Tyrrell <[email protected]> wrote:
> And no, you will not cause any negative impact on non jumbo frames
> traversing the path.
> >
> >Thursday, July 24, 2014, 10:43 AM -0400 from Israel Ogongo <
> [email protected]>:
> >I did check on Cisco site and the linecards supports Jumbo Frames.
> >
> >I also discovered that Jumbo frames can be configured at the interface
> >level on this platform.
> >
> >If I need to configure this on an interface facing a Nexus 5548, will i be
> >breaking any packet flow that are not jumbo?
> >
> >Any feedback on previous exposure at this level would be greatly
> >appreciated.
> >
> >Thank you,
> >I
> >
> >On Thu, Jul 24, 2014 at 1:31 PM, Israel Ogongo < [email protected] >
> wrote:
> >
> >> Thank you Christian,
> >>
> >> Please see details below:
> >>
> >> Mod Ports Card Type Model
> Serial
> >> No.
> >> --- ----- -------------------------------------- ------------------
> >> -----------
> >> 1 8 CEF720 8 port 10GE with DFC WS-X6708-10GE
> >> SAL1431PMV0
> >> 2 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX
> >> SAL1552ZC2Y
> >> 5 5 Supervisor Engine 720 10GE (Active) VS-S720-10G
> >> SAL1434RE4W
> >>
> >> Mod MAC addresses Hw Fw Sw
> >> Status
> >> --- ---------------------------------- ------ ------------ ------------
> >> -------
> >> 1 5475.d06e.2098 to 5475.d06e.209f 2.2 12.2(18r)S1 12.2(33)SXH8
> Ok
> >> 2 70ca.9b68.b348 to 70ca.9b68.b377 4.2 12.2(18r)S1 12.2(33)SXH8
> Ok
> >> 5 c47d.4ffe.1c38 to c47d.4ffe.1c3f 3.4 8.5(4) 12.2(33)SXH8
> Ok
> >>
> >> Mod Sub-Module Model Serial Hw
> >> Status
> >> ---- --------------------------- ------------------ ----------- -------
> >> -------
> >> 1 Distributed Forwarding Card WS-F6700-DFC3C SAL1431PTEW 1.4
> Ok
> >> 2 Centralized Forwarding Card WS-F6700-CFC SAL16010AP0 4.1
> Ok
> >> 5 Policy Feature Card 3 VS-F6K-PFC3C SAL1434RMY0 1.2
> Ok
> >> 5 MSFC3 Daughterboard VS-F6K-MSFC3 SAL1433QQK5 5.0
> Ok
> >>
> >> Mod Online Diag Status
> >> ---- -------------------
> >> 1 Pass
> >> 2 Pass
> >> 5 Pass
> >>
> >>
> >>
> >> On Thu, Jul 24, 2014 at 12:46 PM, Christian Schroeder <
> >> [email protected] > wrote:
> >>
> >>> Hi Israel,
> >>>
> >>>
> >>> on the 6509 the MTU capabilities depend on the linecard.
> >>>
> >>> Can you tell us which linecards you use?
> >>> The output of a "show module" should give us sufficient information for
> >>> further investigation.
> >>>
> >>>
> >>> Cheers,
> >>> Christian
> >>>
> >>>
> >>>
> >>> On Thu, 24 Jul 2014, Israel Ogongo wrote:
> >>>
> >>> Hi all,
> >>>>
> >>>> I am trying to implement Jumbo Frames for Backup / Data Domain
> purposes
> >>>> at
> >>>> the Data Center.
> >>>>
> >>>> The configuration is straight forward on the Nexus 5548 based on my
> >>>> different research but my CORE is a 6509 running VSS.
> >>>>
> >>>> Please if anyone has implemented Jumbo Frames in such an environment,
> >>>> would
> >>>> like to hear from you and how it has been implemented without error. I
> >>>> dont
> >>>> have a lab environment to simulate this first hence, looking for
> anyone
> >>>> with previous hands on...
> >>>>
> >>>> Here is the network setup:
> >>>>
> >>>> 6500A ---- 6500B
> >>>> | |
> >>>> | |
> >>>> Nexus 5kA Nexus 5KB - vPC
> >>>> | |
> >>>> | |
> >>>> Many Nexus 2Ks and the Servers are hanging off here..
> >>>>
> >>>> The Data Domain hangs off the nexus 5548.
> >>>>
> >>>> The question is, how to enable Jumbo Frames on the 6500s - should it
> be
> >>>> on
> >>>> the interfaces participating in Port-Channel connecting to Nexus 5Ks?
> >>>>
> >>>> Would greatly appreciate your feedback.
> >>>>
> >>>> thank you,
> >>>> _______________________________________________
> >>>> Free CCIE R&S, Collaboration, Data Center, Wireless & Security Videos
> ::
> >>>>
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> >>>>
> >>>>
> >>
> >_______________________________________________
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> >
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> _______________________________________________
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>
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