Reference Guide

● ip–address2 ip-address3 — (Optional) Enter up two additional IPv4 or IPv6 name servers,
separated with a space.
Default Not configured
Command Mode CONFIGURATION
Usage
Information
OS10 does not support sending DNS queries over a VLAN. DNS queries are sent out on all other
interfaces, including the Management port. You can separately configure both IPv4 and IPv6 domain
name servers. In a dual stack setup, the system sends both A (request for IPv4) and AAAA (request for
IPv6) record requests to a DNS server even if you only configure this command. The no version of this
command removes the IP name-server configuration.
Example
OS10(config)# ip name-server 10.1.1.5
Supported
Releases
10.2.0E or later
show hosts
Displays the host table and DNS configuration.
Syntax
show hosts [vrf vrf-name]
Parameters vrf vrf-name — Enter the keyword vrf followed by the name of the VRF to display DNS host
information corresponding to that VRF.
Default Not configured
Command Mode EXEC
Usage
Information
This command displays domain and host information.
Example
OS10# show hosts
Default Domain Name : dell.com
Domain List : abc.com
Name Servers : 1.1.1.1 20::2
=============================================
Static Host to IP mapping Table
=============================================
Host IP-Address
---------------------------------------------
dell-pc1 20.1.1.1
Supported
Releases
10.2.0E or later
DHCP Limitations
This section lists the limitations in DHCP functionality.
IPv4 DHCP asymmetric routing
OS10 does not support DHCP relay with IPv4 asymmetric routing. OS10 supports DHCP relay with IPv6 asymmetric routing.
The DHCP relay agent listens on the best DHCP server path. If the DHCP OFFER packet is sent through a path that the DHCP
relay agent is not listening on, the DHCP OFFER packet drops. In this case, the DHCP client-enabled interface does not receive
the IPv4 address.
For example, in the following topology, the DHCP DISCOVER packet is sent by the relay agent (R4) on link 2. The relay agent
routing table points only to link 2 to reach the DHCP server. However, the DHCP server sends the DHCP OFFER packet to relay
agent (R4) on a different path and the DHCP OFFER packet drops.
476
System management