The MPLS-OPS Archive

["M. ELK" <elkou141061@hotmail.com>]

Hi


consider the simple case :

PE11,PE12,PE13 client for RR1 .
PE21,PE22,PE23 client for RR2.

PE11 , advertise RT NLRI say (1,4) . where 1 is the AS Nbr and 4 is the RT .
similarly PE12 and PE13
(all the 3 PE's are interested to receive VPNv4 route with RT=4)
RR1 will do the best path selection and say it is the one received from PE11 
.
RR1 will advertise the following :

1)To PE11 ,PE12 and PE13 .
   chnage the orginator-id and next-hop to itself (as indicated in the 
draft) and send to all the 3 client

and

2) send to RR2 with orig-id set as PE11 and next-hop unchanged (ie:PE11 )


My question :

PE11 withdraw the advertisement .
RR1 have to do the best path (say this time the one from PE12) and 
readvertise as above .

my guess this step is not needed and better to be eliminated by the 
following :

When sending advertisement to non client peer , the RR set the orig-ID and 
next-hop to itself .
so when PE11 withdraw his advertisement RR1 simply have to do nothing .

As an anology with multicast , when memeber leave the group and as far as 
still their is other memeber so no specific action needed to inform the 
other multicast peer .

is the above workable ???,any points i am missing ??.

Brgds

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