An engineer must configure the HSRP protocol between two Cisco Nexus 9000 Series Switches.
This configuration is present on Nexus A.

The final HSRP configuration must meet these requirements:
* The HSRP communication must be secured on both switches.
* Both switches must support more than 300 groups.
Which two commands must be added to the HSRP configuration on Nexus A to complete these requirements? (Choose two.)
Correct Answer: C,D
Cisco NX-OS supports HSRP version 1 by default. You can configure an interface to use HSRP version 2.
HSRP version 2 has the following enhancements to HSRP version 1:
- Expands the group number range. HSRP version 1 supports group numbers from 0 to 255.
HSRP version 2 supports group numbers from 0 to 4095.
- For IPv4, uses the IPv4 multicast address 224.0.0.102 or the IPv6 multicast address FF02::66 to send hello packets instead of the multicast address of 224.0.0.2, which is used by HSRP version
1.
- Uses the MAC address range from 0000.0C9F.F000 to 0000.0C9F.FFFF for IPv4 and
0005.73A0.0000 through 0005.73A0.0FFF for IPv6 addresses. HSRP version 1 uses the MAC address range 0000.0C07.AC00 to 0000.0C07.ACFF.
- Adds support for MD5 authentication.
This example shows how to configure MD5 authentication for HSRP on Ethernet 1/2 after creating the key chain:
switch# configure terminal
switch(config)# key chain hsrp-keys
switch(config-keychain)# key 0
switch(config-keychain-key)# key-string 7 zqdest
switch(config-keychain-key) accept-lifetime 00:00:00 Jun 01 2013 23:59:59 Sep 12 2013 switch(config-keychain-key) send-lifetime 00:00:00 Jun 01 2013 23:59:59 Aug 12 2013 switch(config-keychain-key) key 1 switch(config-keychain-key) key-string 7 uaeqdyito switch(config-keychain-key) accept-lifetime 00:00:00 Aug 12 2013 23:59:59 Dec 12 2013 switch(config-keychain-key) send-lifetime 00:00:00 Sep 12 2013 23:59:59 Nov 12 2013 switch(config-keychain-key)# interface ethernet 1/2 switch(config-if)# hsrp 2 switch(config-if-hsrp)# authentication md5 key-chain hsrp-keys switch(config-if-hsrp)# copy running-config startup-config Reference:
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/6- x/unicast/configuration/guide/l3_cli_nxos/l3_hsrp.html