background image

Page 17 | AlliedWare™ OS How To Note: Hardware Filters

Appendix A: How to use the layer 4 mask in classifiers

The following table shows the port ranges for the largest blocks.

  

L4 mask:

 FC00

 F800

 F000

 E000

 C000

 8000

 0000

number of ports:

 

1

024

 2048 

 4096

 8

1

92

 

1

6384

 32768

 65536

0

0

0

0

0

0

0

1

024

2048

4096

8

1

92

1

6384

32768

65536

2048

4096

8

1

92

1

6384

32768

65536

3072

6

1

44

1

2288

24576

49

1

52

4096

8

1

92

1

6384

32768

65536

5

1

20

1

0240

20480

40960

6

1

44

1

2288

24576

49

1

52

7

1

68

1

4336

28672

57344

8

1

92

1

6384

32768

65536

92

1

6

1

8432

36864

1

0240

20480

40960

11

264

22528

45056

1

2288

24576

49

1

52

1

33

1

2

26624

53248

1

4336

28672

57344

1

5360

30720

6

1

440

1

6384

32768

65536

1

7408

348

1

6

1

8432

36864

1

9456

389

1

2

20480

40960

2

1

504

43008

22528

45056

23552

47

1

04

24576

49

1

52

25600

5

1

200

26624

53248

27648

55296

28672

57344

29696

59392

30720

6

1

440

3

1

744

63488

32768

65536

33792

348

1

6

35840

36864

37888

389

1

2

39936

40960

4

1

984

43008

44032

45056

46080

47

1

04

48

1

28

Содержание AT-9900 Series

Страница 1: ...he throughput of the switch It is possible to configure over 1000 different filters and still have complete wire speed throughput on the switch The following configuration methods are available 1 To f...

Страница 2: ...en combining QoS and hardware filters 8 2 The profile mask 9 Are there enough bytes for your set of filters 10 Some protocols also use filters so use some of the length 11 How to see the current filte...

Страница 3: ...B DIAg NLSp IPXwan ipxsocketnum ANY TCPSport portid port range ANY TCPDport portid port range ANY UDPSport portid port range ANY UDPDport portid port range ANY L4SMask mask L4DMask mask L5BYTE01 byteo...

Страница 4: ...ote see page 13 Note The default value of each mask is FFFF This means that if you specify a port number without specifying a mask then the classifier matches only that one value of the port number Th...

Страница 5: ...hey will all be treated like core ports if at least one of the ports is a core port Creating hardware filters Once you have created a classifier create a filter The filter uses the classifier and spec...

Страница 6: ...matches the packets in the stream and specify copy discard for the action setl2qos Note that this action has the other parameters associated with it as the following syntax shows add switch hwfilter f...

Страница 7: ...cket as if it belongs to the default traffic class for the port s QoS policy For this reason we only recommend combining hardware filters and QoS if all your hardware filters result in traffic being d...

Страница 8: ...an be configured on different ports So the rules for allocating packet to flow groups can differ from port to port Hence QoS can result in the rule table containing different sets of rules for differe...

Страница 9: ...filters that can be created Also the protocols that use filters see page 11 create at least one entry each 2 The profile mask The other item that affects the number of filters you can create is called...

Страница 10: ...already matches on those fields If you next make a hardware filter that matches on source UDP port this also does not add any length to the mask because it shares the same 2 bytes as the source TCP po...

Страница 11: ...n IP address destination TCP UDP port 6 6 1 4 2 19 bytes Some protocols also use filters so use some of the length The following protocols use filters and therefore use up some of the available profil...

Страница 12: ...one block on the base system for packets arriving in via any other port z one block allocated on the IPv6 accelerator Number of rules per application MLD Snooping 4 Accel Card IPv6 1 Switch HwFilter 2...

Страница 13: ...they are both 1 then the result is 1 otherwise the result is 0 Let s look at some examples Profile 1 IPv4 bytes used 3 of 16 Other Eth bytes used 5 of 16 Profile used to match on packets z Number of b...

Страница 14: ...choose the number of the ports as 4 power of 2 to simplify the example Before going into the complex examples there are some points to remember for the L4 mask calculation z if the beginning port is...

Страница 15: ...drop Example 3 ports 333 777 A more complex situation let s try to write the classifiers for UDP ports between 333 777 As we are trying to get rid of odd numbers in the beginning of our port range we...

Страница 16: ...ed 2 x 2 blocks one at the start classifier 2 and one at the end classifier 8 256 384 383 511 Port range Number of ports Command 333 334 335 336 351 352 383 384 511 512 767 768 775 776 777 1 2 16 32 1...

Страница 17: ...12288 24576 49152 4096 8192 16384 32768 65536 5120 10240 20480 40960 6144 12288 24576 49152 7168 14336 28672 57344 8192 16384 32768 65536 9216 18432 36864 10240 20480 40960 11264 22528 45056 12288 245...

Страница 18: ...ts reserved Information in this document is subject to change without notice All company names logos and product designs that are trademarks or registered trademarks are the property of their respecti...

Отзывы: