Upload at 14:53 on May 13, 2021
The encrypted packet is assigned a sequence number. The packet with repeated sequence number discarded by vdge router -- replay packetThe packet whose serial number is lower than the minimum number of sliding window is discarded by the vdge routerWhen a packet with a higher serial number than that received so far is received, the vdge router advances the sliding windowSliding window has cos consciousness, which can prevent low priority traffic from "slowing down" high priority traffic
7、 Bidirectional forwarding detection (BFD)
1217531-20210113144705480-374723669.png (99.51 KB, 0 downloads)[/I]
Upload at 14:53 on May 13, 2021
Tunnel activity detection Bidirectional echo of BFD message -- there is no BFD neighbor between tunnelsAs long as the BFD periodic message succeeds, the IPSec Security Association will keep running normally - there is no idle SA timeout IPSec tunnel
Author:CARLOS_ CHIANG
source:http://www.cnblogs.com/yaoyaojcy/
Source:01 introduction to Cisco sd-wan architecture concepts and basic terms
Source:02Establishment process of Cisco sd-wan control layer connection | 
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Post time 13-5-2021 16:15:22
