Dell Networking S6000 Uživatelský manuál stáhnout pdf (Strana 299)

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• To display statistics about DHCP client interfaces, use the show ip dhcp client statistics

interface type slot/port command.

• To clear DHCP client statistics on a specified or on all interfaces, use the clear ip dhcp client

statistics {all | interface type slot/port} command.

• To display dynamic IP address lease information currently assigned to a DHCP client interface, use the

show ip dhcp lease [interface type slot/port] command.

• To display log messages for all DHCP packets sent and received on DHCP client interfaces, use the

debug ip dhcp client packets [interface type slot/port] command.

• To display log message on DHCP client interfaces for IP address acquisition, IP address release, IP

address and lease time renewal, and release an IP address, use the [no] debug ip dhcp client

events [interface

type slot/port] command.

DHCP Client on a Management Interface

These conditions apply when you enable a management interface to operate as a DHCP client.

• The management default route is added with the gateway as the router IP address received in the

DHCP ACK packet. It is required to send and receive traffic to and from other subnets on the external

network. The route is added irrespective when the DHCP client and server are in the same or different

subnets. The management default route is deleted if the management IP address is released like other

DHCP client management routes.

• ip route for 0.0.0.0 takes precedence if it is present or added later.

• Management routes added by a DHCP client display with Route Source as DHCP in the show ip

management route

and show ip management-route dynamic command output.

• Management routes added by DHCP are automatically reinstalled if you configure a static IP route

with the ip route command that replaces a management route added by the DHCP client. If you

remove the statically configured IP route using the no ip route command, the management route

is reinstalled. Manually delete management routes added by the DHCP client.

• To reinstall management routes added by the DHCP client that is removed or replaced by the same

statically configured management routes, release the DHCP IP address and renew it on the

management interface.

• Management routes added by the DHCP client have higher precedence over the same statically

configured management route. Static routes are not removed from the running configuration if a

dynamically acquired management route added by the DHCP client overwrites a static management

route.

• Management routes added by the DHCP client are not added to the running configuration.

NOTE: Management routes added by the DHCP client include the specific routes to reach a DHCP

server in a different subnet and the management route.

DHCP Client Operation with Other Features

The DHCP client operates with other Dell Networking OS features, as the following describes.

Stacking

The DHCP client daemon runs only on the master unit and handles all DHCP packet transactions. It

periodically synchronizes the lease file with the standby unit.

When a stack failover occurs, the new master requires the same DHCP server-assigned IP address on

DHCP client interfaces. The new master reinitiates a DHCP packet transaction by sending a DHCP

discovery packet on nonbound interfaces.

Dynamic Host Configuration Protocol (DHCP)

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