Enabling/Disabling The Function To Ping The Virtual Ip Address; Enabling/Disabling The Check Of Ttl Value Of Vrrp Packet; Setting Correspondence Between Virtual Ip Address And Mac Address - H3C S9500 Series Operation Manual

Operation Manual – Reliability
H3C S9500 Series Routing Switches

1.2.1 Enabling/Disabling the Function to Ping the Virtual IP Address

This operation enables or disables the function to ping the virtual IP address of the
virtual router. The standard protocol of VRRP does not support the ping function, then
the user cannot judge with ping command whether an IP address is used by the virtual
router. If the user configure the IP address for the host same as the virtual IP address of
the virtual router, then all messages in this segment will be forwarded to the host.
So H3C S9500 Series Routing Switches (hereinafter referred to as S9500 series)
provide the ping function to ping the virtual IP address of the virtual router.
Perform the following configuration in system view.
Table 1-1 Enable/disable the ping function
Enable to ping the virtual IP address
Disable to ping the virtual IP address
By default, the function to ping the virtual IP address is disabled.
You should set the ping function before configuring the virtual router. If a virtual router is
already established on the switch, it is not allowed to use the vrrp ping-enable
command and the undo vrrp ping-enable command to modify the configuration any
more.

1.2.2 Enabling/Disabling the Check of TTL Value of VRRP Packet

This operation configures whether to check TTL value of VRRP packet on the Backup
switch. The TTL value must be 225. If the Backup switch find TTL is not 225 when
receiving VRRP packet, the packet will be discarded.
Perform the following configuration in VLAN interface view.
Table 1-2 Enable/disable the check of TTL value of VRRP packet
Disable the check of TTL value of VRRP packet
Enable the check of TTL value of VRRP packet
By default, the switch checks TTL value of VRRP packets.

1.2.3 Setting Correspondence between Virtual IP Address and MAC Address

This operation sets correspondence between the virtual lP address and the MAC
address. In the standard protocol of VRRP, the virtual IP address of the virtual router
Operation
Operation
1-3
Chapter 1 VRRP Configuration
Command
vrrp ping-enable
undo vrrp ping-enable
Command
vrrp un-check ttl
undo vrrp un-check ttl