Edge-Core ECS4210-12P Reference Manual page 647

Command Usage
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An IP address must be assigned to this device to gain management access over
the network or to connect the switch to existing IP subnets. A specific IP
address can be manually configured, or the switch can be directed to obtain an
address using Auto IP, or from a BOOTP or DHCP server. Valid IP addresses
consist of four numbers, 0 to 255, separated by periods. Anything other than
this format will not be accepted by the configuration program.
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An interface can have only one primary IP address, but can have many
secondary IP addresses. In other words, secondary addresses need to be
specified if more than one IP subnet can be accessed through this interface.
Note that a secondary address cannot be configured prior to setting the
primary IP address, and the primary address cannot be removed if a secondary
address is still present. Also, if any router/switch in a network segment uses a
secondary address, all other routers/switches in that segment must also use a
secondary address from the same network or subnet address space.
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If IP address mode is set to autoip, the switch randomly selects an IPv4 link-
local address from 169.254.0.1~169.254.255.254. Before starting to use it, the
switch tests to see if the address is already in use.
Conflict detection is done using ARP probes. The switch waits a predefined
number of seconds after the transmission of the last ARP probe. If no
conflicting ARP Reply or ARP Probe has been received, then the switch has
successfully claimed the desired IPv4 link-local address.
When a network interface transitions from inactive to active state, the switch
does not know what IPv4 link-local addresses are currently in use on that link
since the point of attachment may have changed or the network interface may
have been inactive when a conflicting address was claimed. In this case, the
switch again starts sending ARP probes to see if the previously selecting
address has been claimed by another device on the network.
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If bootp or dhcp options are selected, the system will immediately start
broadcasting service requests for all VLANs configured to obtain address
assignments through BOOTP or DHCP. IP is enabled but will not function until a
BOOTP or DHCP reply has been received. Requests are broadcast periodically
by the router in an effort to learn its IP address. (BOOTP and DHCP values can
include the IP address, default gateway, and subnet mask). If the DHCP/BOOTP
server is slow to respond, you may need to use the
command to re-start broadcasting service requests, or reboot the switch.
Example
In the following example, the device is assigned an address in VLAN 1.
Console(config)#interface vlan 1
Console(config-if)#ip address 192.168.1.5 255.255.255.0
Console(config-if)#
Chapter 26
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| IP Interface Commands
IPv4 Interface
ip dhcp restart client