博科交换机配置指导手册研讨.ppt

Main Message VRRP-e and VRRP are router services and need to be enabled Having configured the ip address of the port or VE, assign a vrrp-e vrid to the interface then assign an ip address and packup priority and track priority. Finally nominate a track port Command Line Entry Configure one of your router ports for VRRP-E as per the commands in the slide KEY POINTS Note that the command backup priority 160 track-priority 20 causes problems as there is no – in between backup and priority but there is between track-priority Although not in the simulator the ere is an additional parameter called slow-start what should be configured. In the event of the failure of the VRRP-E master when it returns to service VRRP-E waits for the period set by the VRRP-E slow-start parameter before switching back over to the master. Slow-start 1 – 255 seconds Main Message The slide above shows the output from the Backup router In the above slide, Router_C has the lowest “priority” 150 so it obtains a state of “backup”. Note that the “priority” and the “current priority” are the same. The ip address of the the Master routers physical interface is also reported at the bottom. Command Line Entry Show ip vrrp-e Your Simulator will be a VRRP-E master KEY POINTS 1 Main Message VRRPE – Master (Track Port failure) In the above slide, Router_B’s track port has failed. The current priority is reduced by the amount of the “track-port priority” This subtraction is enough to lower the current priority to be less than the current priority of Router_C which leads to the failover. Router_B’s state goes to backup. Command Line Entry none KEY POINTS The advantages that VRRP-extended has over VRRP are: At this point the Host can still ping its gateway. It is possible to define two or more Track ports on one router. There may be an application where it is preferred to keep Router B as the Master if one of the track ports fail but decrement Router B’s current priority so that the next f