Nortel Networks 608(WL) - Manual (Page 204)

Chapter 6
Advanced Features
E-DOC-CTC-20051017-0169 v0.1 202
Dead Peer Detection The SpeedTouch™ supports the Dead Peer Detection protocol.
By default, the use of this protocol is enabled. This option allows disabling the use
of the DPD protocol.
DPD Idle Period The DPD protocol defines a worry period. This is an idle time during which no IPSec
traffic is detected from the remote peer. At the expiry of this period the local peer
transmits a number of R-U-THERE messages to detect the liveliness of the remote
peer.
This option sets the duration of the idle period, expressed in seconds.
DPD number of
Transmits
This option determines the number of R-U-THERE transmitted by the local peer. If
none of these messages is acknowledged in due time by the remote peer, it is
decided that the remote peer is dead.
DPD Timeout This option determines the timeout value for the R-U-THERE messages. Within this
period an R-U-THERE acknowledge message from the remote peer is expected.
Tunnel inactivity timeout When no traffic is detected at the peer for a certain period, it is decided that the
tunnel is not used any more, and the IKE session is terminated. All IPSec
connections supported by the IKE session are terminated as well.
This option sets the value of the inactivity timer.
DPD Possible values default value
enabled
disabled enabled
dpd_idle_period Unit default value
seconds 180
dpd_xmits default value
3
dpd_timeout Unit default value
seconds 120
inactivity Unit default value
seconds 3600