Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module Configuration Guide - Page 183

To view the DHCP snooping statistics, use the show ip dhcp snooping command (Figure 9-10). Figure 9-10. Command example: show ip dhcp snooping FTOS#show ip dhcp snooping IP DHCP Snooping IP DHCP Snooping Mac Verification IP DHCP Relay Information-option IP DHCP Relay Trust Downstream : Disabled. : Disabled. : Disabled. : Enabled. Database write-delay (In minutes) : 0 DHCP packets information Relay Information-option packets : 0 Relay Trust downstream packets : 0 Snooping packets : 0 Packets received on snooping disabled L3 Ports : 0 Snooping packets processed on L2 vlans : 0 DHCP Binding File Details Invalid File : 0 Invalid Binding Entry : 0 Binding Entry lease expired : 0 FTOS# Drop DHCP Packets on Snooped VLANs Only Binding table entries are deleted when a lease expires or the relay agent encounters a DHCPRELEASE. Starting with FTOS Release 8.2.1.1, line cards maintain a list of snooped VLANs. When the binding table fills, DHCP packets are dropped only on snooped-VLANs, while such packets are forwarded across non-snooped VLANs. Because DHCP packets are dropped, no new IP address assignments are made. However, DHCP release and decline packets are allowed so that the DHCP snooping table can decrease in size. After the table usage falls below the max limit of 4000 entries, new IP address assignments are allowed. Dynamic Host Configuration Protocol (DHCP) | 181