Service Manual

• EXEC Privilege
Command History
This guide is platform-specic. For command information about other platforms, refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.8(0.0) Introduced on the S3048-ON and S4048-ON.
9.2(1.0) Introduced on the Z9500.
9.0.0.0 Introduced on the Z9000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.1 Introduced on the S4810.
Example
Dell# show ipv6 neighbors
IPv6 Address Expires(min) Hardware Address State Interface VLAN CPU
--------------------------------------------------------------------------------------------------------------
100::1 0.03 00:00:00:00:00:22 DELAY Gi 1/12 - CP
fe80::200:ff:fe00:22 232 00:00:00:00:00:22 STALE Gi 1/12 - CP
500::1 0.60 00:01:e8:17:5c:af REACH Gi 1/13 - CP
fe80::200:ff:fe00:17 232 00:00:00:00:00:29 REACH Gi 1/14 - CP
900::1 0.60 00:01:e8:17:5c:b1 STALE Po 23 - CP
400::1 0.60 00:01:e8:17:5c:ae REACH Gi 1/2 Vl 100 CP
Dell#
IPv6 Router Advertisement (RA) Guard
The IPv6 RA guard provides support to perform conditional forwarding or blocking of the router advertisement messages that are
received at the network device platform. This functionality analyzes and lters the RAs sent by the devices and compares the
conguration information on the layer 2 device with the RA frame. Once the layer 2 device validates the content of the RA frame
against the conguration, it forwards the RA to its unicast or multicast destination. On failure to validate the RA frame content, the
RA frame is dropped.
The IPv6 RA guard supports two dierent modes:
• Host mode — When a policy with device role as host is applied on an interface, all the RA packets are dropped without
validation. You can also congure the host mode policy with VLAN option to drop the RA packets on that specic VLAN and
port.
• Router mode — When a policy with device role as router is applied on an interface, all the RA packets are validated based on the
conguration information in the policy. Similarly, you can also apply this mode over any specic VLAN and the validation is
performed only for that particular VLAN RA packets.
To congure the IPv6 RA guard, use the following Dell Networking OS commands.
debug ipv6 nd ra-guard
Enable debugging for IPv6 RA guard snooping information.
Syntax
debug ipv6 nd ra-guard [interface_type slot/port | count value]
Parameters
interface_type slot/
port
Enter the one of the following interfaces and slot/port information:
Neighbor Discovery Protocol (NDP)
955