Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 435)

Brocade ICX 6650 Layer 3 Routing Configuration Guide 417
53-1002603-01
VRRP and VRRP-E overview
NOTE
The HMAC-MD5-96 authentication type is supported for VRRP-E, but not supported for VRRP.
Independent operation of VRRP alongside RIP, OSPF, and BGP4
VRRP operation is independent of RIP, OSPF, and BGP4; therefore, RIP, OSPF, and BGP4 are not
affected if VRRP is enabled on one of these interfaces.
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.
VRRP-E overview
The most important difference between VRRP and VRRP-E is that all VRRP-E routers are Backup
routers; there is no Owner router. VRRP-E overcomes the limitations in standard VRRP by removing
the Owner.
The following points explain how VRRP-E differs from VRRP:
• Owners and Backup routers
- VRRP has an Owner and one or more Backup routers 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 Backup routers.
- VRRP-E does not use Owners. All routers are Backup routers for a given VRID. The router
with the highest priority becomes the Master. If there is a tie for highest priority, the router
with the highest IP address becomes the Master. The elected Master owns the virtual IP
address and answers pings and ARP requests.
• VRID's IP address
- VRRP requires that the VRID’s IP address also be a real IP address configured on the
VRID's interface on the Owner.
- VRRP-E requires only that the VRID be in the same subnet as an interface configured on
the VRID's interface. VRRP-E does not allow you to specify a real IP address configured on
the interface as the VRID IP address.
• VRID's MAC address
- VRRP uses the source MAC address as a virtual MAC address defined as
00-00-5E-00-01-vrid, where vrid is the VRID. The Master owns the virtual MAC address.
- VRRP-E uses the MAC address of the interface as the source MAC address. The MAC
address is 02-E0-52-hash-value-vrid, where hash-value is a two-octet hashed value for the
IP address and vrid is the VRID.