Configuring Filters Without a Sequence NumberIf you are creating an extended ACL with only one or two filters, you can let Dell Networking OS assign asequence number based on the order in which the filters are configured. Dell Networking OS assignsfilters in multiples of five.To configure a filter for an extended IP ACL without a specified sequence number, use any or all of thefollowing commands:• Configure a deny or permit filter to examine IP packets.CONFIG-EXT-NACL mode{deny | permit} {source mask | any | host ip-address} [count [byte]] [order][fragments]• Configure a deny or permit filter to examine TCP packets.CONFIG-EXT-NACL mode{deny | permit} tcp {source mask] | any | host ip-address}} [count [byte]][order] [fragments]• Configure a deny or permit filter to examine UDP packets.CONFIG-EXT-NACL mode{deny | permit} udp {source mask | any | host ip-address}} [count [byte]][order] [fragments]When you use the log keyword, the CP logs details about the packets that match. Depending on howmany packets match the log entry and at what rate, the CP may become busy as it has to log thesepackets’ details.The following example shows an extended IP ACL in which the sequence numbers were assigned by thesoftware. The filters were assigned sequence numbers based on the order in which they were configured(for example, the first filter was given the lowest sequence number). The show config command in IPACCESS LIST mode displays the two filters with the sequence numbers 5 and 10.Example of Viewing Filter Sequence for a Specified Extended ACLDell(config-ext-nacl)#deny tcp host 123.55.34.0 anyDell(config-ext-nacl)#permit udp 154.44.123.34 0.0.255.255 host 34.6.0.0Dell(config-ext-nacl)#show config!ip access-list extended nimuleseq 5 deny tcp host 123.55.34.0 anyseq 10 permit udp 154.44.0.0 0.0.255.255 host 34.6.0.0Dell(config-ext-nacl)#To view all configured IP ACLs and the number of packets processed through the ACL, use the show ipaccounting access-list command in EXEC Privilege mode, as shown in the first example inConfigure a Standard IP ACL Filter.Configure Layer 2 and Layer 3 ACLsBoth Layer 2 and Layer 3 ACLs may be configured on an interface in Layer 2 mode.If both L2 and L3 ACLs are applied to an interface, the following rules apply:Access Control Lists (ACLs) 101
