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Configuring Traffic Filters and Protocol Prioritization
4-6 117348-A Rev. A
To configure criteria for both IP and data link reference points, you create two
filters: one with the IP criterion and the other with the Datalink criterion. For
example, if you want to prioritize Frame Relay traffic with data link connection
identifier (DLCI) 400 in the High queue, create filters for both the IP and Datalink
DLCI criterion, using a range value of 400.
Selecting User-Defined Criteria
To create a filter with a user-defined criterion, you specify the offset and length to
a supported reference point in the data link or IP packet header. This section
describes the following reference points for specifying user-defined outbound
traffic filter criteria:
• Da
ta Link Reference Points
• IP Reference Points
Data Link Reference Points
Table 4-3 defines the reference points in the data link header from which you can
build user-defined criterion
Figures 4-3 and 4-4 show examples of where these reference points are located in
a packet.
Table 4-3. Data Link Reference Points
Reference Point Definition
MAC Points to the high-order byte of the destination address
DATA_LINK Points to the first byte following the length/type criteria
DL_HEADER_START Points to the beginning of the header (beginning of the
packet) for PPP and Frame Relay packets
DL_HEADER_END Points to the first byte following the DLCI in a Frame Relay
packet, and the first byte following the protocol ID in a PPP
packet
DL_FR_MPE Points to the NLPID (Frame Relay packets only)
DL_SR_START Points to the beginning of the SRB packet, which is the
high-order byte of the destination address
DL_SR_DATA_LINK Points to the first byte following the RIF
- Configuring Traffic Filters 1
- Bay Networks Software License 3
- Contents 5
- 117348-A Rev. A 11
- About This Guide 15
- Conventions 16
- Acronyms 17
- Bay Networks Customer Service 19
- How to Get Help 20
- Chapter 1 21
- Using Traffic Filters 21
- Inbound Traffic Filters 22
- Outbound Traffic Filters 23
- Filtering Strategies 24
- Combine Filters 25
- Build a Firewall 25
- Traffic Filter Components 26
- Using Traffic Filters 27
- Predefined Criteria 28
- 1-10 117348-A Rev. A 30
- 1-12 117348-A Rev. A 32
- Using Filter Templates 33
- 1-14 117348-A Rev. A 34
- Chapter 2 35
- Priority Queuing 36
- The Dequeuing Process 37
- 117348-A Rev. A 2-5 39
- 2-6 117348-A Rev. A 40
- 117348-A Rev. A 2-7 41
- 2-8 117348-A Rev. A 42
- Tuning Concepts 44
- 117348-A Rev. A 2-11 45
- Queue Size Example 46
- Reconfiguring Queue Size 46
- Examples 47
- 2-14 117348-A Rev. A 48
- 117348-A Rev. A 2-15 49
- Chapter 3 51
- Transparent Bridge Actions 54
- Predefined SRB Criteria 55
- User-Defined SRB Criteria 56
- SRB Actions 56
- Predefined DECnet Criteria 57
- User-Defined DECnet Criteria 57
- DECnet Actions 57
- DLSw Criteria and Actions 58
- IP Criteria and Actions 59
- IP Actions 60
- IPX Criteria and Actions 61
- LLC2 Criteria and Actions 62
- OSI Criteria and Actions 63
- VINES Criteria and Actions 64
- XNS Criteria and Actions 65
- Chapter 4 67
- Selecting Predefined Criteria 68
- Predefined IP Criteria 70
- 117348-A Rev. A 4-5 71
- Data Link Reference Points 72
- IP Reference Points 74
- Selecting Actions 75
- Prioritizing Actions 76
- Dial Service Actions 76
- 117348-A Rev. A 4-11 77
- Chapter 5 79
- Specifying MAC Address Ranges 80
- SRB Functional MAC Addresses 81
- 5-4 117348-A Rev. A 82
- Table 5-3. SAP Codes 82
- Table 5-4. Frame Relay NLPIDs 83
- Table 5-5. PPP Protocol IDs 83
- 5-6 117348-A Rev. A 84
- 5-8 117348-A Rev. A 86
- 88
- 88
- Chapter 6 89
- 6-2 117348-A Rev. A 90
- 117348-A Rev. A 6-3 91
- 117348-A Rev. A 6-5 93
- 6-8 117348-A Rev. A 96
- 6-10 117348-A Rev. A 98
- 117348-A Rev. A 6-11 99
- 6-12 117348-A Rev. A 100
- 117348-A Rev. A 6-13 101
- 6-14 117348-A Rev. A 102
- 6-16 117348-A Rev. A 104
- 6-18 117348-A Rev. A 106
- 6-20 117348-A Rev. A 108
- Chapter 7 109
- 7-2 117348-A Rev. A 110
- 117348-A Rev. A 7-3 111
- Creating a Template 112
- 113
- 7-6 117348-A Rev. A 114
- 7-8 117348-A Rev. A 116
- Customizing Templates 117
- 7-10 117348-A Rev. A 118
- 117348-A Rev. A 7-11 119
- 7-12 117348-A Rev. A 120
- Drop_Telnet_S42 121
- SRB_DSAP_hiQ 121
- 7-14 117348-A Rev. A 122
- 7-16 117348-A Rev. A 124
- 7-18 117348-A Rev. A 126
- 7-20 117348-A Rev. A 128
- 117348-A Rev. A 7-21 129
- 7-22 117348-A Rev. A 130
- 117348-A Rev. A 7-23 131
- Appendix A 133
- 134
- 117348-A Rev. A A-3 135
- A-4 117348-A Rev. A 136
- 117348-A Rev. A A-5 137
- A-6 117348-A Rev. A 138
- 139
- 140
- Appendix B 141
- 142
- (continued) 143
- B-4 117348-A Rev. A 144
- filtering goals 145
- B-8 117348-A Rev. A 148
- Configuring DLSw 149
- Services 149
- (continued) 149
- B-10 117348-A Rev. A 150
- Implementation Notes 151
- B-12 117348-A Rev. A 152
- 117348-A Rev. A B-13 153
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