[j-nsp] MPLS label stack limits on MX line cards

[Adam Vitkovsky]

> From: Nitzan Tzelniker [mailto:nitzan.tzelniker at gmail.com] 
> Sent: 01 June 2015 19:04
>
> The default limit is 3 but you can change it to 5 
> http://www.juniper.net/techpubs/en_US/junos14.2/topics/task/configuration/interfaces-mpls-maximum-labels.html

Yeah I could see that the limit is 3 and can be increased to 5 –but what does the limit limits is the question? :)

Does it limit the number of labels that can be imposed on to a packet at once by a LSR?
Does it limit the number of labels that can be pop-ed from a packet at once by a LSR?
Does it limit the number of labels that can be used in hashing algo?
Or does it just foolishly limits the number of labels in a label stack because Juniper made a bold statement saying no one will ever need more than 5 labels in a label stack and makes the effort to check if the fifth label does have the EOS bit set and if it doesn’t the packet must have indeed been corrupted thus it will be dropped? :)


adam
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