[j-nsp] MPLS VPN Load-balancing

[Harry Reynolds]

>From what I know, I-chip is like T-series (lmnr) wrt hashing. 

http://www.juniper.net/techpubs/en_US/junos9.6/information-products/topic-collections/config-guide-policy/policy-configuring-load-balancing-based-on-mpls-labels.html

I'm pretty sure that mx can do mpls plus ip payload, as per above. I have read the default for mpls is incoming interface and 3 labels (not using exp). There is some confusion as to whether enabling ip hashing affects/disables the label hash. I've seen both stated. 

This seems to document that, at least for pseudo wires, Ip payload forces a single label hash:

http://www.juniper.net/techpubs/en_US/junos9.6/information-products/topic-collections/config-guide-policy/policy-configuring-load-balancing-for-ethernet-pseudowires.html

The above makes it seem that Ip hashing for mpls is only supported for "ethernet", but the previous link documents the same label 1, payload IP syntax in a generic context as providing hashing on "label 1 and Ip SA/DA".

So, seems to me that:

1. You should expect same for mx as for T

2. That we can factor 2 labels and IP SA/DA on above, or up top 3 labels

3. That using l3 only also adds ports (from l4), and requires no label hash.

4. There seems to be a special ethernet pseudo wire mode that allows for only 1 label and Ip payload, but not clear on whether its ports or just SA/DA.

Maybe someone cane now clarify the above and we will have gotten somewhere. 

Hope this is not too stuffed up.

Regards



-----Original Message-----
From: Daniel Verlouw [mailto:daniel at bit.nl] 
Sent: Wednesday, August 12, 2009 12:51 PM
To: Harry Reynolds
Cc: juniper-nsp
Subject: Re: [j-nsp] MPLS VPN Load-balancing

Hi Harry,

On Aug 12, 2009, at 6:50 PM, Harry Reynolds wrote:
> T-series platforms with e-fpcs and MX can hash on multiple MPLS labels 
> while *also* hashing on L3 and l4.
>
> This seems to jive with the docs at:
>
> http://www.juniper.net/techpubs/en_US/junos9.6/information-products/to
> pic-collections/config-guide-policy/policy-configuring-load-balancing-
> based-on-mpls-labels.html

the following document mentions multiple labels + payload hashing is supported on M320 and T-series:

<http://www.juniper.net/techpubs/en_US/junos9.6/information-products/topic-collections/config-guide-mpls-applications/mpls-configuring-load-balancing-for-mpls-lsps.html
 >

There's no mention of I-chip based systems (M120 or MX) on this page.  
Does this imply those can also hash only on the first label + payload ?

    --Daniel.