Dell Force10 E1200i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 138
Con a standard IP ACL
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www.dell.com | support.dell.com Note the following when configuring ACLs with the fragments keyword. When an ACL filters packets it looks at the Fragment Offset (FO) to determine whether or not it is a fragment. FO = 0 means it is either the first fragment or the packet is a non-fragment. FO > 0 means it is dealing with the fragments of the original packet. Permit ACL line with L3 information only, and the fragments keyword is present: If a packet's L3 information matches the L3 information in the ACL line, the packet's fragment offset (FO) is checked. • If a packet's FO > 0, the packet is permitted. • If a packet's FO = 0 , the next ACL entry is processed. Deny ACL line with L3 information only, and the fragments keyword is present: If a packet's L3 information does match the L3 information in the ACL line, the packet's fragment offset (FO) is checked. • If a packet's FO > 0, the packet is denied. • If a packet's FO = 0, the next ACL line is processed. Configure a standard IP ACL To configure an ACL, use commands in the IP ACCESS LIST mode and the INTERFACE mode. The following list includes the configuration tasks for IP ACLs: For a complete listing of all commands related to IP ACLs, refer to the FTOS Command Line Interface Reference document. Refer to Configure an extended IP ACL to set up extended ACLs. A standard IP ACL uses the source IP address as its match criterion. Note: On E-Series ExaScale systems, TCP ACL flags are not supported in standard or extended ACLs with IPv6 microcode. An error message is shown if IPv6 microcode is configured and an ACL is entered with a TCP filter included. FTOS(conf-ipv6-acl)#seq 8 permit tcp any any urg May 5 08:32:34: %E90MJ:0 %ACL_AGENT-2-ACL_AGENT_ENTRY_ERROR: Unable to write seq 8 of list test as individual TCP flags are not supported on linecard 0 To configure a standard IP ACL, use these commands in the following sequence: Step Command Syntax 1 ip access-list standard access-listname Command Mode CONFIGURATION Purpose Enter IP ACCESS LIST mode by naming a standard IP access list. 138 | IP Access Control Lists (ACL), Prefix Lists, and Route-maps
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