D-Link DGS-3627G Product Manual - Page 64

xStack® DGS-3600 Series Layer 3 Managed Gigabit Ethernet Switch DHCP/BOOTP Relay The DHCP/BOOTP Relay Hops Count Limit allows the maximum number of hops (routers) that the DHCP/BOOTP messages can be relayed through to be set. If a packet's hop count is more than the hop count limit, the packet is dropped. The range is between 1 and 16 hops, with a default value of 4. The relay time threshold sets the minimum time (in seconds) that the Switch will wait before forwarding a BOOTREQUEST packet. If the value in the seconds field of the packet is less than the relay time threshold, the packet will be dropped. The range is between 0 and 65,536 seconds, with a default value of 0 seconds. DHCP / BOOTP Relay Global Settings This table is used to enable and configure DHCP/BOOTP Relay global settings on the Switch. To view this window, click Administration > DHCP/BOOTP Relay > DHCP/BOOTP Relay Global Settings, as shown below: Figure 2- 47. DHCP/ BOOTP Relay Global Settings window The following fields can be set: Parameter Description DHCP/BOOTP Relay State This field can be toggled between Enabled and Disabled using the pull-down menu. It is used to enable or disable the DHCP/BOOTP Relay service on the Switch. The default is Disabled DHCP/BOOTP Relay Hops Count Limit (116) This field allows an entry between 1 and 16 to define the maximum number of router hops DHCP/BOOTP messages can be forwarded across. The default hop count is 4. DHCP/BOOTP Relay Time Threshold (065535) Allows an entry between 0 and 65535 seconds, and defines the maximum time limit for routing a DHCP/BOOTP packet. If a value of 0 is entered, the Switch will not process the value in the seconds field of the BOOTP or DHCP packet. If a non-zero value is entered, the Switch will use that value, along with the hop count to determine whether to forward a given BOOTP or DHCP packet. DHCP Vendor Class Identifier Option 60 State This function can enable or disable the DHCP Vendor class identifier option 60 state. When option 60 is enabled, if the packet does not have option 60, then the relay servers cannot be determined based on option 60. The relay servers will be determined based on either option 60 or per IPIF configured servers. If the relay servers are determined based on option 60, then the IPIF configured servers will be ignored. If the relay servers are not determined by option 60 then the IPIF configured servers will be used to determine the relay servers. DHCP Client Identifier This function can enable or disable the DHCP Client identifier option 61 state. When option Option 61 State 61 State is Enabled, if the packet does not have option 61, then the relay servers cannot be 48