HSRP v2 mac address range is 0000:0C9F:F000 to 0000:009F:FFFF for virtual gateway address.įor our lab practice, we’ll use the topology below from GNS3.
The default Hello timer is 3 seconds and Hold Timer is 10 seconds (roughly 3 times the hello timer). The first 24 bits 0000:0c are vendor ID.In HSRP version 1, the virtual MAC address has a format, where “xx” is the HSRP group number is hexadecimal format. HSRP preemption allows another gateway ( new router and member of HSRP group) with higher priority value to assume functionality of active gateway when Active router is already present for HSRP group. Uses a Type/Length/Value (LTV) Hello packet format.Uses multicast address 224.0.0.102 to send Hello messages.Uses UDP port 1985 for sending and receiving Hello packets.It has Limited configurable HSRP groups of 255.This is the default HSRP on Cisco IOS that is enabled when standby command is executed.There are two versions of HSRP supported by Cisco IOS software. The primary ( Active) router will be forwarding packets destined to the virtual gateway IP address of the HSRP group, secondary router performs this forwarding in the event that the Active gateway fails. All network hosts on same subnet as the gateways must be assigned the Virtual IP address as their default gateway. The router which is part of HSRP group with highest priority will be elected as the Active router. Physical routers configured as part of same HSRP group share same virtual gateway address. If the primary router (gateway) fails, the Standby router will take over as Active router. One of the routers will act as Primary ( Active) router while the other as Secondary (Standby) router. HSRP works by simply configuring one or more routers to be part of HSRP group. Hot Standby Router Protocol (HSRP) is a Cisco proprietary First Hop Redundancy Protocol (FHRP). we have done so far SSH configuration, DNS server setup, Telnet Access. HSRP Configuration on GNS3 is a continuation of our CCNA GNS3 Labs for Cisco IOS.
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