A county backup system marks bulk replication with a specific DSCP value, and the fabric must send those flows into a low-priority path routing instance. How should filter-based forwarding classify and steer that traffic?
Select an answer to reveal the explanation.
Short Explanation
DSCP is the sticky note on the box saying “bulk backup—use the slow dock.” The filter reads that mark and FBF ships those packets into the low-priority instance. ECMP guessing or wiping DSCP throws away the classification you already paid for.
Full Explanation
FBF classification keys include addresses, ports, and DSCP (among other fields). Matching the backup DSCP in a firewall filter and applying a routing-instance (FBF) action places those flows on the intended low-priority path instance. Underlay ECMP alone does not select a logical routing instance from DSCP, and clearing DSCP removes the signal needed for that policy.