HP StorageWorks MSA 2/8 HP StorageWorks Fabric OS 3.X Document Addendum (AA-RW - Page 152

Long-Distance Trunking

Page 152 highlights

ISL trunking user guide Add the following section at the end of Chapter 1: Long-Distance Trunking This section provides information on long-distance trunking between Fabric OS v3.2 switches, including the SAN Switch 2/8 EL and SAN Switch 2/16. Long-distance ISL trunking is a new feature for Fabric OS v3.2.x and Fabric OS v4.4.0. Long-Distance Trunking Requirements Requirements for ISL Trunking and Extended Fabrics in Fabric OS v3.2.x are as follows: ■ The ISL Trunking and Extended Fabrics licenses are required. ■ All trunk group ports must be part of the same quad. ■ All trunk group ports must be running at 2 Gbit/sec. ISL Trunking does not support 1 Gbit/sec speeds. ■ All trunk group ports must have similar deskew values. ■ ISL Trunking is automatically enabled between adjacent switches that support trunking. ■ All trunking ports in the same trunk group should be configured to be the same Extended Fabrics distance (for example, LD - LD, L0.5 - L0.5, or L1 - L1). ■ As the distance increases, more buffer credits are needed, and fewer ports can form a trunk group. ■ SAN Switch 2/8 EL and SAN Switch 2/16 ASICs limit buffer allocation to 63 maximum per port, so long-distance trunks can be established only up to this buffer limit. Long-Distance Trunking Summary The following is a summary of SAN Switch 2/8 EL and SAN Switch 2/16 long-distance settings and supported distances: ■ L0 less than or equal to 5 km and a 2-, 3-, or 4-port trunk group (normal distance trunking allocates 26 buffer credits across 4 data VCs) ■ LE less than or equal to 10 km and a 2-, 3-, or 4-port trunk group (allocates 19 buffer credits across VC2) ■ L0.5 less than or equal to 25 km and a 2- or 3-port trunk group (allocates 29 buffer credits across VC2) ■ L1 less than or equal to 50 km and a 2-port trunk group (allocates 54 buffer credits across VC2) ■ L2 less than or equal to 100 km (no trunking support) ■ LD less than or equal to 100 km (trunking supported at distances under 50 km) 152 Fabric OS 3.x Document Addendum

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250

ISL trunking user guide
152
Fabric OS 3.x Document Addendum
Add the following section at the end of Chapter 1:
Long-Distance Trunking
This section provides information on long-distance trunking between Fabric OS v3.2 switches,
including the SAN Switch 2/8 EL and SAN Switch 2/16. Long-distance ISL trunking is a new
feature for Fabric OS v3.2.x and Fabric OS v4.4.0.
Long-Distance Trunking Requirements
Requirements for ISL Trunking and Extended Fabrics in Fabric OS v3.2.x are as follows:
The ISL Trunking and Extended Fabrics licenses are required.
All trunk group ports must be part of the same quad.
All trunk group ports must be running at 2 Gbit/sec. ISL Trunking does not support 1
Gbit/sec speeds.
All trunk group ports must have similar deskew values.
ISL Trunking is automatically enabled between adjacent switches that support trunking.
All trunking ports in the same trunk group should be configured to be the same Extended
Fabrics distance (for example, LD - LD, L0.5 - L0.5, or L1 - L1).
As the distance increases, more buffer credits are needed, and fewer ports can form a trunk
group.
SAN Switch 2/8 EL and SAN Switch 2/16 ASICs limit buffer allocation to 63 maximum
per port, so long-distance trunks can be established only up to this buffer limit.
Long-Distance Trunking Summary
The following is a summary of SAN Switch 2/8 EL and SAN Switch 2/16 long-distance
settings and supported distances:
L0 less than or equal to 5 km and a 2-, 3-, or 4-port trunk group (normal distance trunking
allocates 26 buffer credits across 4 data VCs)
LE less than or equal to 10 km and a 2-, 3-, or 4-port trunk group (allocates 19 buffer
credits across VC2)
L0.5 less than or equal to 25 km and a 2- or 3-port trunk group (allocates 29 buffer credits
across VC2)
L1 less than or equal to 50 km and a 2-port trunk group (allocates 54 buffer credits across
VC2)
L2 less than or equal to 100 km (no trunking support)
LD less than or equal to 100 km (trunking supported at distances under 50 km)