Disabling Nd Entry Timeout; Configuring Ipv6 Ra Guard - Dell S6100 Configuration Manual

Disabling ND Entry Timeout

When a peer system warmboots or performs an ISSU, the ND entries in the local system may time out resulting in traffic loss. You can
configure the system to keep the learnt neighbor discovery entries stateless so that the ND entries do not time out. To configure the
system to keep the learnt neighbor discovery entries stateless, follow these steps:
• Disable the ND timer:
INTERFACE
ipv6 nd disable-reachable-timer
• To reenable the ND timer, use the no form of the command:
INTERFACE
no ipv6 nd disable-reachable-timer
The following example shows how to disable the ND timer.
Dell(conf-if-fo-1/1/1)#ipv6 nd disable-reachable-timer

Configuring IPv6 RA Guard

The IPv6 Router Advertisement (RA) guard allows you to block or reject the unwanted router advertisement guard messages that arrive at
the network device platform.
To configure the IPv6 RA guard, perform the following steps:
1 Configure the terminal to enter the Global Configuration mode.
EXEC Privilege mode
configure terminal
2 Enable the IPv6 RA guard.
CONFIGURATION mode
ipv6 nd ra-guard enable
3 Create the policy.
POLICY LIST CONFIGURATION mode
ipv6 nd ra-guard policy policy-name
4 Define the role of the device attached to the port.
POLICY LIST CONFIGURATION mode
device-role {host | router}
Use the keyword host to set the device role as host.
Use the keyword router to set the device role as router.
5 Set the hop count limit.
POLICY LIST CONFIGURATION mode
hop-limit {maximum | minimum limit}
The hop limit range is from 0 to 254.
6 Set the managed address configuration flag.
POLICY LIST CONFIGURATION mode
446 IPv6 Routing