The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] RE: doubt in RFC 3031
IMHO you are right with your statement, that normally a P-router (the penultimate hop) does only label swapping based on the outermost label and this a single lookup. the sentence maybe could be better phrased in that way: " This technique allows the egress to do a single lookup, without requiring any additional lookup by the penultimate node " But I think, that by reading the whole chapter the meaning of PHP is clear and that this single sentence in his original wording put into the context does not do any harm. regards Alexander Marhold Senior Consultant PRO IN -----Original Message----- From: owner-mpls@UU.NET [mailto:owner-mpls@UU.NET]On Behalf Of Bhupesh Bajaj Sent: Monday, April 30, 2001 12:12 PM To: prabhu_b@in.huawei.com; asheeshj@in.huawei.com; srinivasch@in.huawei.com Cc: mpls-ops@mplsrc.com Subject: doubt in RFC 3031 hi all. while going thru RFC 3031 , in Page 18 , second paragraph says... " This technique allows the egress to do a single lookup, and also requires only a single lookup by the penultimate node " isnt the penultimate node going to do a single lookup anyway...? or i have got it all wrong..? according to what i perceived...the penultimate node is going to look into the label which it received and then sends the packet to the next hop according to the information in the label it received with packet...which means ...single lookup.... when would it do a second lookup..? is it referring to the second lookup that the penultimate node will have to do when it wouldnt find the label in the stack which it is expecting ...and it will go for network layer information...? kindly let me know. thanks and regards, bhupesh. Get Your Private, Free E-mail from Indiatimes at http://email.indiatimes.com ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml
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