Administrator Guide

interface GigabitEthernet 2/2
no ip address
ipv6 address 3:4:5:6::8/24
shutdown
DellEMC#
Clearing IPv6 Routes
To clear routes from the IPv6 routing table, use the following command.
• Clear (refresh) all or a specific route from the IPv6 routing table.
EXEC mode
clear ipv6 route {* | ipv6 address prefix-length}
• *: all routes.
• ipv6 address: the format is x:x:x:x::x.
• mask: the prefix length is from 0 to 128.
NOTE: IPv6 addresses are normally written as eight groups of four hexadecimal digits, where each group is
separated by a colon (:). Omitting zeros is accepted as described in Addressing.
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.
DellEMC(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.
372
IPv6 Routing