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The NQA client simulates the DHCP relay agent to forward DHCP requests for IP address acquisition
from the DHCP server. The interface that performs the DHCP operation does not change its IP
address. When the DHCP operation completes, the NQA client sends a packet to release the
obtained IP address.
To configure the DHCP operation:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Create an NQA operation
and enter NQA operation
view.
nqa
entry
admin-name
operation-tag
By default, no NQA operations exist.
3.
Specify the DHCP type and
enter its view.
type dhcp
N/A
4.
Specify the IP address of
the DHCP server as the
destination IP address of
DHCP packets.
destination ip
ip-address
By default, no destination IP address is
specified.
5.
(Optional.) Specify an
output interface for DHCP
request packets.
out interface
interface-type
interface-number
By default, the output interface for DHCP
request packets is not specified. The NQA
client determines the output interface based
on the routing table lookup.
6.
(Optional.) Specify the
source IP address of DHCP
request packets.
source ip
ip-address
By default, the packets take the primary IP
address of the output interface as their
source IP address.
The specified source IP address must be
the IP address of a local interface, and the
local interface must be up. Otherwise, no
probe packets can be sent out.
The NQA client adds the source IP address
to the
giaddr
field in DHCP requests to be
sent to the DHCP server. For more
information about the
giaddr
field, see
Layer 3—IP Services Configuration Guide
.
Configuring the DNS operation
The DNS operation measures the time for the NQA client to translate a domain name into an IP
address through a DNS server.
A DNS operation simulates domain name resolution and does not save the obtained DNS entry.
To configure the DNS operation:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Create an NQA operation
and enter NQA operation
view.
nqa
entry
admin-name
operation-tag
By default, no NQA operations
exist.
3.
Specify the DNS type and
enter its view.
type dns
N/A
4.
Specify the IP address of
the DNS server as the
destination address of DNS
packets.
destination ip
ip-address
By default, no destination IP
address is specified.