Users Guide

Table Of Contents
32 Contents
R-APS Channel . . . . . . . . . . . . . . . . . . . . . 1045
Traffic Channel
. . . . . . . . . . . . . . . . . . . . . 1046
Ring Scope
. . . . . . . . . . . . . . . . . . . . . . . 1046
Ethernet Ring Protection Port Status
. . . . . . . . . 1046
Ethernet Ring Protection Timers
. . . . . . . . . . . . 1047
Hold-off
. . . . . . . . . . . . . . . . . . . . . . 1047
Wait-to-Restore
. . . . . . . . . . . . . . . . . . 1047
Guard Timer
. . . . . . . . . . . . . . . . . . . . 1047
Wait-to-Block
. . . . . . . . . . . . . . . . . . . 1047
Revertive and Non-Revertive Operation Modes
. . . . 1048
Revertive
. . . . . . . . . . . . . . . . . . . . . 1048
Non-Revertive
. . . . . . . . . . . . . . . . . . . 1048
ERPS Subrings
. . . . . . . . . . . . . . . . . . . . . 1048
Without R-APS Virtual Channel
. . . . . . . . . . 1049
With R-APS Virtual Channel
. . . . . . . . . . . 1049
Topology Change Notification
. . . . . . . . . . . . . 1049
Protection Switching Triggers
. . . . . . . . . . . . . 1049
Ring Failure Detection
. . . . . . . . . . . . . . . . . 1050
Ring Protection Example
. . . . . . . . . . . . . . . . 1050
27 Snooping and Inspecting Traffic . . . . . 1053
Traffic Snooping and Inspection Overview . . . . . . 1053
What Is DHCP Snooping?
. . . . . . . . . . . . . 1054
How Is the DHCP Snooping Bindings Database Populated?
1055
What Is IP Source Guard?
. . . . . . . . . . . . 1058
What is Dynamic ARP Inspection?
. . . . . . . . 1059