Dell FCX624-S Laptop User Manual


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PowerConnect B-Series FCX Configuration Guide 1109
53-1002266-01
Comparison of VRRP and VRRPE
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Configuration note
VRRP-E is supported in the edge Layer 3 and full Layer 3 code only. It is not supported in the base
Layer 3 code.
Comparison of VRRP and VRRPE
This section compares router redundancy protocols.
VRRP
VRRP is a standards-based protocol, described in RFC 2338. The Dell implementation of VRRP
contains the features in RFC 2338. The Dell implementation also provides the following additional
features:
Track ports – A Dell feature that enables you to diagnose the health of all the Layer 3 Switch
ports used by the backed-up VRID, instead of only the port connected to the client subnet.
Refer to “Track ports and track priority” on page 1105.
Suppression of RIP advertisements on Backup routes for the backed up interface – You can
enable the Layer 3 Switches to advertise only the path to the Master router for the backed up
interface. Normally, a VRRP Backup router includes route information for the interface it is
backing up in RIP advertisements.
Dell Layer 3 Switches configured for VRRP can interoperate with third-party routers using VRRP.
VRRPE
VRRPE is a Dell protocol that provides the benefits of VRRP without the limitations. VRRPE is unlike
VRRP in the following ways:
There is no “Owner” router. You do not need to use an IP address configured on one of the
Layer 3 Switches as the virtual router ID (VRID), which is the address you are backing up for
redundancy. The VRID is independent of the IP interfaces configured in the Layer 3 Switches.
As a result, the protocol does not have an “Owner” as VRRP does.
There is no restriction on which router can be the default master router. In VRRP, the “Owner”
(the Layer 3 Switch on which the IP interface that is used for the VRID is configured) must be
the default Master.
Dell Layer 3 Switches configured for VRRPE can interoperate only with other Dell Layer 3 Switches.
Architectural differences
The protocols have the following architectural differences:
Management protocol
VRRP – VRRP routers send VRRP Hello and Hello messages to IP Multicast address
224.0.0.18.
VRRPE – VRRPE sends messages to destination MAC address 01-00-5E-00-00-02 and
destination IP address 224.0.0.2 (the standard IP multicast address for “all routers”).