Dell PowerConnect B-FCXs, Руководство по настройке

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1106 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Overview
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In Figure 151 on page 1103, the track priority results in Switch 1 VRRP priority becoming lower
than Switch 2 VRRP priority. As a result, when Switch 2 learns that it now has a higher priority than
Switch 1, Switch 2 initiates negotiation for Master router and becomes the new Master router, thus
providing an open path for Host1 traffic. To take advantage of the track port feature, make sure
the track priorities are always lower than the VRRP priorities. The default track priority for the
router that owns the VRID IP addresses is 2. The default track priority for Backup routers is 1. If
you change the track port priorities, make sure you assign a higher track priority to the Owner of
the IP addresses than the track priority you assign on the Backup routers.
Suppression of RIP advertisements for backed up interfaces
The Dell implementation also enhances VRRP by allowing you to configure the protocol to suppress
RIP advertisements for the backed up paths from Backup routers. Normally, a VRRP Backup router
includes route information for the interface it is backing up in RIP advertisements. As a result,
other routers receive multiple paths for the interface and might sometimes unsuccessfully use the
path to the Backup rather than the path to the Master. If you enable the Dell implementation of
VRRP to suppress the VRRP Backup routers from advertising the backed up interface in RIP, other
routers learn only the path to the Master router for the backed up interface.
Authentication
The Dell implementation of VRRP can use simple passwords to authenticate VRRP packets. The
VRRP authentication type is not a parameter specific to the VRID. Instead, VRRP uses the
authentication type associated with the interfaces on which you define the VRID. For example, if
you configure your router interfaces to use a simple password to authenticate traffic, VRRP uses
the same simple password and VRRP packets that do not contain the password are dropped. If
your interfaces do not use authentication, neither does VRRP.
NOTE
The MD5 authentication type is not supported for VRRP.
Independent operation of VRRP alongside RIP, OSPF, and BGP4
VRRP operation is independent of the RIP, OSPF, and BGP4 protocols. Their operation is
unaffected when VRRP is enabled on a RIP, OSPF, or BGP4 interface.
Dynamic VRRP configuration
All VRRP global and interface parameters take effect immediately. You do not need to reset the
system to place VRRP configuration parameters into effect.
Overview of VRRPE
VRRPE is similar to VRRP, but differs in the following respects:
•
Owners and Backup:
•
VRRP has an Owner and one or more Backups for each VRID. The Owner is the router on
which the VRID's IP address is also configured as a real address. All the other routers
supporting the VRID are Backups.