Hello,
I did an issu upgrade on an MX240 with dual routing engines, going
from 15.1R6 to 17.4R2, and I had reviewed the fine manuals particularly
concerning advance steps to ensure nonstop routing and so forth. But
during the upgrade (near the very end), the router did offline my MPC 3D
16x 10GE, resulting in loss of routing for 5 minutes. According to
juniper in their docs that state that:
"Unified ISSU is supported with Junos OS Release 17.4R1 for MX Series
routers with MPC-3D-16XGE-SFPP"
my expectations were that the card would stay online and there
would be little to no operational impact, but this clearly wasn't the
case. I am just wondering if anyone can tell me why this might have been
the case and in the future what steps I would need to take to ensure
this both otherwise stays on the air during a future software update?
Thank you.
Mike-
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