Virtual Router Initiation; Adding Virtual Router Ip Addresses; Setting The Priority For The Virtual Router; Setting The Time Interval For Advertisement Packets - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Chapter 51 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

Virtual Router Initiation

By default, a virtual router is always disabled. VRRP can be configured only if this state is enabled. Be
sure to configure at least one IP address, either IPv4 or IPv6, before attempting to enable a VR.

Adding Virtual Router IP Addresses

One virtual router IP address can be configured for a virtual router. If the configured IP address is the
same as the interface IP address, this switch automatically owns the IP address. You can configure either
an IPv4 address or an IPv6 address.
According to the VRRP specification, the master VRRP router drops the packets addressed to the virtual
router's IP address because the virtual router is only intended as a next-hop router to forward packets. In
MDS switches however, some applications require that packets addressed to virtual router's IP address
be accepted and delivered to them. By using the secondary option to the virtual router IPv4 address, the
VRRP router will accept these packets when it is the master.
To manage IP addresses for virtual routers from Device Manager, follow these steps:
Step 1 Choose IP > VRRP. You see the Operations tab of the VRRP dialog box.
Step 2 Click the IP Addresses tab on the VRRP dialog box.
To create a new VRRP entry, click Create. You see the Create VRRP IP Addresses window.
Step 3
Complete the fields in this window to create a new VRRP IP Address, and click OK or Apply.
Step 4

Setting the Priority for the Virtual Router

The valid range to assign a virtual router priority is 1 to 254 with 1 being the lowest priority and 254
being the highest priority. The default value is 100 for switches with secondary IP addresses and 255 for
switches with the primary IP address.

Setting the time Interval for Advertisement Packets

The valid time range for an advertisement packet on an interface using IPv4 is between 1 and 255
seconds. The default value is 1 (one) second. If the switch has the primary IP address, this time must be
specified.

Configuring or Enabling Priority Preemption

You can enable a higher priority backup virtual router to preempt the lower priority master virtual router.
If the virtual IP address is also the IP address for the interface, then preemption is implicitly applied.
Note
The VRRP preemption is not supported on IP storage Gigabit Ethernet interfaces.
Note
OL-17256-03, Cisco MDS NX-OS Release 4.x
Cisco MDS 9000 Family Fabric Manager Configuration Guide
Virtual Router Redundancy Protocol
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