The value of vRtrLdpGenLabelWithdrawalDelay specifies the time
interval, in seconds, LDP will delay for the withdrawal of FEC-label
binding it distributed to its neighbours when FEC is de-activated.
When the timer expires, LDP then sends a label withdrawal for the FEC
to all its neighbours. This is applicable only to LDP transport
tunnels (ipv4 prefix FECs) and is not applicable to Pseudowires
(service FECs).
A value of 0 indicates that vRtrLdpGenLabelWithdrawalDelay is
disabled.