About Vrrp - Cisco MDS 9000 series Configuration Manual

Chapter 5 Configuring IP Services
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m

About VRRP

VRRP provides a redundant alternative path to the gateway switch, which has connectivity to the NMS.
VRRP has the following characteristics and advantages:
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Note
In Figure
have an IP address to VRRP mapping configured. The other switches set switch A as the default gateway.
If switch A fails, the other switches do not have to change the routing configurations as switch B
automatically becomes the master and takes over the function of a gateway.
Figure 5-6
1.1.1.10
Switch A
Switch D
In Figure
cannot span across different types of interfaces. In both switch 1 and switch 2, the Ethernet interface is
in VR 1 and the FC interface is in VR 2. Each virtual router is uniquely identified by the VSAN interface
and the VR ID.
OL-19525-01,Cisco MDS NX-OS Release 4.2(1)
VRRP is a restartable application.
When a VRRP master fails, the VRRP backup takes over within three times the advertisement time.
VRRP over Ethernet, VRRP over VSAN, and Fibre Channel functions are implemented as defined
in RFC 2338 and the draft-ietf-vrrp-ipv6 specification.
A virtual router is mapped to each VSAN and Ethernet interface with its unique virtual router IP,
virtual router MAC, and VR ID.
VR IDs can be reused in multiple VSANs with different virtual router IP mapping.
Both IPv4 and IPv6 is supported.
The management interface (mgmt 0) supports only one virtual router group. All other interfaces
each support up to seven virtual router groups, including both IPv4 and IPv6 combined. Up to 255
virtual router groups can be assigned in each VSAN.
VRRP security provides three options, including no authentication, simple text authentication, and
MD5 authentication.
If you are using IPv6, you must either configure an IPv6 address on the interface or enable IPv6
on the interface. For more information about IPv6, see
Ethernet Interfaces."
5-6, switch A is the VRRP master and switch B is the VRRP backup switch. Both switches
VRRP Functionality
NMS
Ethernet
connection
1.2.11.1
VRRP
VSAN 1
1.2.11.4
5-7, the fabric example has two virtual router groups (VR1 and VR 2) because a virtual router
NMS
1.1.30
Switch B
1.2.11.2
Switch C
1.2.11.3
Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
Virtual Router Redundancy Protocol
Chapter 8, "Configuring IPv6 for Gigabit
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