Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 110
UDP packets, Command Example, Command Syntax, Command Mode, Purpose
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www.dell.com | support.dell.com Step Command Syntax Command Mode Purpose 2 seq sequence-number {deny | CONFIG-EXT-NACL Configure an extended IP ACL filter for TCP permit} tcp {source mask | any packets. | host ip-address}} [count [byte] | log ] [order] [monitor] • log and monitor options are supported on E-Series only. [fragments] When you use the log keyword, CP processor logs details about the packets that match. Depending on how many packets match the log entry and at what rate, the CP may become busy as it has to log these packets' details. UDP packets: To create a filter for UDP packets with a specified sequence number, use these commands in the following sequence, starting in the CONFIGURATION mode: Step Command Syntax Command Mode Purpose 1 ip access-list extended access-list-name CONFIGURATION Create a extended IP ACL and assign it a unique name. 2 seq sequence-number {deny | CONFIG-EXT-NACL Configure an extended IP ACL filter for UDP permit} {ip-protocol-number packets. udp} {source mask | any | host ip-address} {destination • log and monitor options are supported on E-Series only. mask | any | host ip-address} [operator port [port]] [count [byte] | log ] [order] [monitor] [fragments] When you create the filters with a specific sequence number, you can create the filters in any order and the filters are placed in the correct order. Note: When assigning sequence numbers to filters, keep in mind that you might need to insert a new filter. To prevent reconfiguring multiple filters, assign sequence numbers in multiples of five or another number. Figure 7-7 illustrates how the seq command orders the filters according to the sequence number assigned. In the example, filter 15 was configured before filter 5, but the show config command displays the filters in the correct order. Figure 7-7. Command Example: seq Force10(config-ext-nacl)#seq 15 deny ip host 112.45.0.0 any log Force10(config-ext-nacl)#seq 5 permit tcp 12.1.3.45 0.0.255.255 any Force10(config-ext-nacl)#show confi ! ip access-list extended dilling seq 5 permit tcp 12.1.0.0 0.0.255.255 any seq 15 deny ip host 112.45.0.0 any log Force10(config-ext-nacl)# 110 | Access Control Lists (ACL), Prefix Lists, and Route-maps
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