Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 1043

VRRP Implementation On E-Series ExaScale and TeraScale routers, VRRP is implemented as follows: • When VRF microcode is not loaded, VRRP supports an unlimited total number of VRRP groups on a router and up to 255 VRRP groups on an interface (refer to Table 60-1, "Recommended VRRP Advertise Intervals," in Virtual Router Redundancy Protocol (VRRP)). • When VRF microcode is loaded (refer to Load the VRF CAM Profile), VRRP supports an unlimited total number of VRRP groups on a router and up to 15 VRRP groups on an interface (refer to Table 60-1, "Recommended VRRP Advertise Intervals," in Virtual Router Redundancy Protocol (VRRP)). C-Series supports a total of 128 VRRP groups on the switch with varying number of maximum VRRP groups per interface (Table 60-1, "Recommended VRRP Advertise Intervals," in Virtual Router Redundancy Protocol (VRRP)). S-Series supports a total of 120 VRRP groups on a switch with FTOS or a total of 20 VRRP groups when using SFTOS. The S-Series supports varying number of maximum VRRP groups per interface (Table 60-1, "Recommended VRRP Advertise Intervals," in Virtual Router Redundancy Protocol (VRRP)). Within a single VRRP group, up to 12 virtual IP addresses are supported. Virtual IP addresses can belong to the primary or secondary IP address' subnet configured on the interface. You can ping all the virtual IP addresses configured on the Master VRRP router from anywhere in the local subnet. Though FTOS on E-Series supports unlimited VRRP groups, default VRRP settings may affect the maximum number of groups that can be configured and work efficiently, as a result of hardware throttling VRRP advertisement packets reaching the RP2 processor on the E-Series, the CP on the C-Series, or the FP on the S-Series. To avoid throttling VRRP advertisement packets, Dell Force10 recommends you to increase the VRRP advertisement interval to a value higher than the default value of 1 second. The recommendations are as follows: Table 60-1. Recommended VRRP Advertise Intervals Total VRRP Groups Less than 250 Between 250 and 450 Between 450 and 600 Between 600 and 800 Between 800 and 1000 Between 1000 and 1200 Between 1200 and 1500 Recommended Advertise Interval Groups/Interface E-Series 1 second 2 seconds 3 seconds 4 seconds 5 seconds 7 seconds 8 seconds C-Series 1 second 2 - 3 seconds 4 seconds 5 seconds 5 seconds 7 seconds 8 seconds S-Series 1 second 2 - 3 seconds 3 - 4 seconds 4 seconds 5 seconds 7 seconds 8 seconds E-Series E-Series ExaScale TeraScale 512 255 512 255 512 255 512 255 512 255 512 255 512 255 C-Series S-Series 12 12 24 24 36 36 48 48 84 84 100 100 120 120 Note: 1500 VRRP groups are supported in FTOS Release 6.3.1.0 and later. Virtual Router Redundancy Protocol (VRRP) | 1043