Hi Roy,
VRRP is a functionality to serve default gateway redundancy for certain subnet, ie. certain VLAN.
You can find limits for VRRP scaling (number of VRIDs, VRRP instances per switch) in the release notes: https://documentation.extremenetworks.com/release_notes/ExtremeXOS/30.2/downloads/GUID-239F0B67-21C6-4460-88BE-99289275F8C1.pdf
Hope that helps,
Tomasz