Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 107

Step Command Syntax 2 seq sequence-number {deny | permit} {source [mask] | any | host ip-address} [count [byte] | log ] [order] [monitor] [fragments] Command Mode CONFIG-STD-NACL Purpose Configure a drop or forward filter. The parameters are: • log and monitor options are supported on E-Series only. 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. 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. To view the rules of a particular ACL configured on a particular interface, use the show ip accounting access-list ACL-name interface interface command (Figure 226) in EXEC Privilege mode. Figure 7-3. Command Example: show ip accounting access-list Force10#show ip accounting access ToOspf interface gig 1/6 Standard IP access list ToOspf seq 5 deny any seq 10 deny 10.2.0.0 /16 seq 15 deny 10.3.0.0 /16 seq 20 deny 10.4.0.0 /16 seq 25 deny 10.5.0.0 /16 seq 30 deny 10.6.0.0 /16 seq 35 deny 10.7.0.0 /16 seq 40 deny 10.8.0.0 /16 seq 45 deny 10.9.0.0 /16 seq 50 deny 10.10.0.0 /16 Force10# Figure 7-4 illustrates how the seq command orders the filters according to the sequence number assigned. In the example, filter 25 was configured before filter 15, but the show config command displays the filters in the correct order. Figure 7-4. Command example: seq Force10(config-std-nacl)#seq 25 deny ip host 10.5.0.0 any log Force10(config-std-nacl)#seq 15 permit tcp 10.3.0.0 /16 any Force10(config-std-nacl)#show config ! ip access-list standard dilling seq 15 permit tcp 10.3.0.0/16 any seq 25 deny ip host 10.5.0.0 any log Force10(config-std-nacl)# To delete a filter, use the no seq sequence-number command in the IP ACCESS LIST mode. If you are creating a standard ACL with only one or two filters, you can let FTOS assign a sequence number based on the order in which the filters are configured. The software assigns filters in multiples of 5. Access Control Lists (ACL), Prefix Lists, and Route-maps | 107