Hi all:
Reading JUNOS documents on subject of p2mp and have some questions regarding static p2mp configurations. Here is the diagram:
ce1---pe1---p3---p5---pe7
| \
| \
pe2 pe10
1) On pe1, i have three LSPs configured:
label-switched-path pe1->pe2 {
to "pe2";
p2mp p2mp->pe2;
}
label-switched-path pe1->pe7 {
to "pe7";
p2mp p2mp->pe7;
}
label-switched-path pe1->pe10 {
to "pe10";
p2mp p2mp->pe10;
}
are those configurations correct?
2) for branch nodes p3, p5, according to JUNOS documents, I should configure LSPs on those branch nodes too;
on p3:
label-switched-path p3->pe2 {
to "pe2";
p2mp p2mp->pe2;
}
label-switched-path p3->pe7 {
to "pe7";
p2mp p2mp->pe7;
}
label-switched-path p3->pe10 {
to "pe10";
p2mp p2mp->pe10;
}
on p5:
label-switched-path p5->pe7 {
to "pe7";
p2mp p2mp->pe7;
}
label-switched-path p5->pe10 {
to "pe10";
p2mp p2mp->pe10;
}
3) I captured some data from rsvp on pe1, after I created those p2mp LSP:
Jul 26 15:56:52.175328 RSVP send Path 10.100.3.1->10.100.3.2 Len=248 fe-0/0/0.10
Jul 26 15:56:52.175490 MessageID Len 12 Msg_ID: 34 Epoch: 7781352 (Ack Desired)
Jul 26 15:56:52.175555 Session13 Len 16 10.100.3.1(port/tunnel ID 6155 Ext-ID 10.100.3.1) Proto 0
Jul 26 15:56:52.175639 Hop Len 12 10.100.0.1/0x08dd4490
Jul 26 15:56:52.175690 Time Len 8 30000 ms
Jul 26 15:56:52.175755 SrcRoute Len 20 10.100.0.2 S 10.100.0.30 S
Jul 26 15:56:52.175807 LabelRequest Len 8 EtherType 0x800
Jul 26 15:56:52.175864 Properties Len 24 Primary path p2mp->r2 p2mp-pvc name
Jul 26 15:56:52.175920 SessionAttribute Len 16 Prio (7,0) flag 0x4 "r1->r2"
Jul 26 15:56:52.175979 Sender12 Len 20 P2MP Sender 10.100.3.1(port/lsp ID 1, branch ID 10) SubGrpOrg ID 0xa640301
Jul 26 15:56:52.176033 SubLsp Len 8 Destination 10.100.3.2
Jul 26 15:56:52.176116 Tspec Len 36 rate 0bps size 0bps peak Infbps m 20 M 1500
Jul 26 15:56:52.176170 ADspec Len 48 MTU 1500
Jul 26 15:56:52.176226 RecRoute Len 12 10.100.0.1
According to rfc4875, page 10:
"This section describes modifications made to the Path message format
as specified in [RFC3209] and [RFC3473]. The Path message is
enhanced to signal one or more S2L sub-LSPs. This is done by
including the S2L sub-LSP descriptor list in the Path message as
shown below."
where is this S2L sub-LSP descriptor list"? this "SubLsp Len 8 Destination 10.100.3.2"? It is more like S2L_SUB_LSP IPv4 Object to me according to rfc4875, 19.3.
Also, what is this "Properties Len 24 Primary path p2mp->r2 p2mp-pvc name"? Is it a glue that tie the main LSP to those sub LSPs on those branch nodes together?
Thanks.
