[c-nsp] portchannel load balancing between L3 switch and router

[Pavel Dimow]

Hi Arie,

those are 2 separate SCEs, and my first thought was to use
etherchannel from the 7600 side I would
use source mac lb and from the ASR to use dest mac lb (I have a couple
of LNS's behind the 7600)
Anyhow, because of ASR I can only use per vlan or per flow lb so MGSCP
seams like the only candidate.
If you can provide more details I would be very grateful.

Thank you.


On Wed, Apr 7, 2010 at 6:07 PM, Arie Vayner (avayner) <avayner at cisco.com> wrote:
> Pavel,
>
> Is that the same SCE, or two separate SCEs?
> If it's the same one, then there is no problem. The SCE has a single global session state for all the ports.
>
> If these are separate SCEs, then you may want to use PBR (using source IP on one side and destination IP on the other side). This solution is called MGSCP (multi-gigabit service control point). In this case you would need to break the etherchannel and use L3 interfaces... I can provide more details if relevant.
>
> Arie
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Pavel Dimow
> Sent: Wednesday, April 07, 2010 18:32
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] portchannel load balancing between L3 switch and router
>
> The problem is that between ASR and 7600 is SCE, and as I don't have
> enough experience
> with it, the per flow load balancing can be a problem as I have found that SCE
> requires incoming and outgoing packets to use the same port, or I am
> missing something?
>
> On Tue, Apr 6, 2010 at 4:56 PM, Arie Vayner (avayner) <avayner at cisco.com> wrote:
>> Elmar,
>>
>> Please check this link:
>> http://www.cisco.com/en/US/docs/ios/ios_xe/lanswitch/configuration/guide
>> /lsw_cfg_flwload_xe_ps9587_TSD_Products_Configuration_Guide_Chapter.html
>>
>> You should be looking at the "Flow Based" option...
>>
>> Per the command reference
>> (http://www.cisco.com/en/US/docs/ios/interface/command/reference/ir_l1.h
>> tml#wp1022040) This is available since IOS XE 2.5
>>
>> Arie
>>
>>
>> -----Original Message-----
>> From: cisco-nsp-bounces at puck.nether.net
>> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Elmar K. Bins
>> Sent: Tuesday, April 06, 2010 17:13
>> To: Pavel Dimow
>> Cc: cisco-nsp at puck.nether.net
>> Subject: Re: [c-nsp] portchannel load balancing between L3 switch and
>> router
>>
>> Re Pavel,
>>
>> paveldimow at gmail.com (Pavel Dimow) wrote:
>>
>>> port-channel load-balancing vlan-manual
>>>
>>> and I understand that I can't have one vlan loadbalanced across two
>>> portchannel members but
>>> only the one at the time and second member is standby.
>>>
>>> Am I right or there is another solution?
>>
>> I have tried the same thing (trunk-channeling), and it just does not
>> work on ASRs (yet?).
>>
>> So yes, you are right, there seems to be no other solution right now.
>> Maybe someone from Cisco can tell us whether this issue will be
>> remedied.
>>
>> Yours,
>>        Elmar.
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>
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