HPE7-A06 · Question #83
Why is "linkup-delay-timer exclude lag-list" used in a VSX configuration?
The correct answer is D. to exclude every LAG where another switch is connected during the link-up delay. The linkup-delay-timer exclude lag-list command in a VSX configuration is used to exclude specific LAG interfaces that connect to other switches from the global link-up delay mechanism. By default, the link-up delay timer holds down all interfaces for a defined period after a…
Question
Why is “linkup-delay-timer exclude lag-list” used in a VSX configuration?
Options
- Ato allow upstream router adjacencies to be established during the link-up delay
- Bto perform MSTP calculations correctly during the link-up delay
- Cto ensure the ISL link is not blocked during the link-up delay
- Dto exclude every LAG where another switch is connected during the link-up delay
How the community answered
(14 responses)- B7% (1)
- D93% (13)
Explanation
The linkup-delay-timer exclude lag-list command in a VSX configuration is used to exclude specific LAG interfaces that connect to other switches from the global link-up delay mechanism. By default, the link-up delay timer holds down all interfaces for a defined period after a reboot to prevent loops and ensure stability. However, inter-switch connections (like LAGs to other switches) should not be delayed, as they are essential for fast VSX peer synchronization. Excluding these LAGs ensures they come up immediately while still applying the delay to other access-facing ports.
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