If the VPN session is completely idle the R-U-THERE messages are sent every seconds. ASA may have nothing to send to the peer, but DPD is still sent if the peer is idle. they send R-U-THERE message to a peer if the peer was idle for seconds. follow below post to understand dead peer detection in detail.Ĭonfigure dead peer detection in Cisco router.ĪSA and PIX firewalls support “semi-periodic” DPD only. Before Implementing dead peer detection in Cisco ASA firewall, you must understand What is dead peer detection (DPD)? and how it function.
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