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Configuring the Junos OS to Resynchronize FPC Sequence Numbers with Active FPCs when an FPC Comes Online
On M320, T320, T640, T1600, TX Matrix, and TX Matrix Plus routers, when you bring a Flexible PIC Concentrator (FPC) online, the sequence number on the FPC may not be synchronized with the other active FPCs in the router, which may result in the loss of a small amount of initial traffic.
To avoid any traffic loss, include the fpc-resync statement at the [edit chassis] hierarchy level. This ensures that the sequence numbers of the FPC that is brought online is resynchronized with the other active FPCs in the router.
[edit chassis]fpc-resync;
 | Note: In order to prevent traffic blackholing, the fpc-resync command will have no effect if a single LMNR based FPC and one or more I-chip FPCs exist in the same chassis. |
