Quick Reference Guide

616 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
Configuring IP parameters – Layer 2 Switches
21
Configuring the BOOTP/DHCP reply source address
You can configure the device so that a BOOTP/DHCP reply to a client contains the server IP address
as the source address instead of the router IP address. To do so, enter the following command at
the Global CONFIG level of the CLI.
PowerConnect(config)# ip helper-use-responder-ip
Syntax: [no] ip helper-use-responder-ip
Changing the maximum number of hops to a BootP relay server
Each BootP/DHCP request includes a field Hop Count field. The Hop Count field indicates how
many routers the request has passed through. When the Layer 3 Switch receives a BootP/DHCP
request, the Layer 3 Switch looks at the value in the Hop Count field:
• If the hop count value is equal to or less than the maximum hop count the Layer 3 Switch
allows, the Layer 3 Switch increments the hop count by one and forwards the request.
• If the hop count is greater than the maximum hop count the Layer 3 Switch allows, the Layer 3
Switch discards the request.
To change the maximum number of hops the Layer 3 Switch allows for forwarded BootP/DHCP
requests, use either of the following methods.
NOTE
The BootP/DHCP hop count is not the TTL parameter.
To modify the maximum number of BootP/DHCP hops, enter the following command.
PowerConnect(config)# bootp-relay-max-hops 10
This command allows the Layer 3 Switch to forward BootP/DHCP requests that have passed
through ten previous hops before reaching the Layer 3 Switch. Requests that have traversed 11
hops before reaching the switch are dropped. Since the hop count value initializes at zero, the hop
count value of an ingressing DHCP Request packet is the number of Layer 3 routers that the packet
has already traversed.
Syntax: bootp-relay-max-hops <1 through 15>
Configuring IP parameters – Layer 2 Switches
The following sections describe how to configure IP parameters on a Layer 2 Switch.
NOTE
This section describes how to configure IP parameters for Layer 2 Switches. For IP configuration
information for Layer 3 Switches, refer to “Configuring IP parameters – Layer 3 Switches” on
page 578.
Configuring the management IP address and specifying
the default gateway
To manage a Layer 2 Switch using Telnet or Secure Shell (SSH) CLI connections , you must
configure an IP address for the Layer 2 Switch. Optionally, you also can specify the default gateway.