Hi everyone,
Please consider following example:
PE1-----P--------PE2
|
PE3
All links are 10M.
LSP1->2 is configured with auto bw feature , set up, and hold priority 0, ERO PE1->P->PE2
LSP3->2 is configured with auto be feature, set up and hold priority 1, ERO PE3->P->PE2
Let say we have enough BW therefore both LSPS are established.
Focusing on P:
Case:1
At time T1, LSP1-2 is using 4 M, LSP-3-2 is using 4 M, remaining BW is 2M
At time T2, auto BW feature calculates 8M for LSP-3-2, sine remaining BW is 2M and new BW for LSP3-2 is 8M, there is no enough BW, so priorities will be used . What will happen next?
This is my guess:
Since LSP3-2 is already established therefore set up priority 1 is ignored, but hold priority 1 is compared with hold priority 0 of LSP1-2, lower the better, so LSP1-2 will continue to stay put but LSP3-2 will be torn down?
or
LSP3-2 will stay put as well but new BW of 8M will not be signaled?
Case:2
At time T1, LSP1-2 is using 4 M, LSP-3-2 is using 4 M, remaining BW is 2M
At time T2, auto BW feature calculates 8M for LSP1-2, sine remaining BW is 2M and new BW for LSP1-2 is 8M, there is no enough BW, so priorities will be used .
LSP1-2 is already established therefore set up priority 0 is ignored, but hold priority 0 is compared with hold priority 1 of LSP3-2, lower the better, therefore LSP3-2 will be torn down, and LSP1-2 will be re signaled with 8M?
Thanks and have a good day!!
