The multi peer group (MPG) PNNI migration process can be divided into three steps:
Preparation A well-designed addressing scheme minimizes the preparation tasks.
Migration While PNNI is down during the migration, SSCOP remains up. This means that the connection states are maintained. Routing however is blocked since the PNNI node is unreachable for PNNI routing.
Monitoring After the migration, several validation tests need to be performed. Among the things you should monitor are the CPU real time and memory of the switching system, SVC and SPVC status, nodes and links aggregated as expected, and addresses summarized as planned. It is strongly discouraged to reduce the PTSE timers to age out outdated PTSEs. This can be detrimental to the node health and will induce instability.
