Cabletron Systems CSX100 series User Manual - page 128
ISDN Router
114
Appendix B. Subnetwork Tables
Numbers of
Users
Mask in
decimal
Mask in
hexadecimal
Bits in
mask
Range of valid
addresses
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.1 - .6
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.9 - .14
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.17 - . 22
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.25 - .30
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.33 - .38
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.41 - .46
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.49 - .54
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.57 - .62
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.65 - .70
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.73 - . 78
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.81 - .86
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.89 - .94
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.97 - .102
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.105 - .110
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.113 - .118
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.121 - .126
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.129 - .134
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.137 - .142
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.145 - .150
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.153 - .158
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.161 - .166
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.169 - .174
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.177 - .182
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.185 - .190
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.193 - .198
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.201 - .206
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.209 - .214
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.217 - .222
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.225 - .230
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.233 - .238
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.241 - .246
5 (+ 1 router)
255.255.255.248
FFFFFFF8
29
.249 - .254
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.1 - .14
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.17 - .30
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.33 - .46
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.49 - .62
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.65 - . 78
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.81 - .94
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.97 - .110
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.113 - .126
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.129 - .142
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.145 - .158
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.161 - .174
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.177 - .190
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.193 - .206
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.209 - .222
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.225 - .238
13 (+ 1 router)
255.255.255.240
FFFFFFF0
28
.241 - .254
29 (+ 1 router)
255.255.255.224
FFFFFFE0
27
.1 - .30
29 (+ 1 router)
255.255.255.224
FFFFFFE0
27
.33 - .62
29 (+ 1 router)
255.255.255.224
FFFFFFE0
27
.65 - .94
29 (+ 1 router)
255.255.255.224
FFFFFFE0
27
.97 - .126
29 (+ 1 router)
255.255.255.224
FFFFFFE0
27
.129 - .158
29 (+ 1 router)
255.255.255.224
FFFFFFE0
27
.161 - .190
29 (+ 1 router)
255.255.255.224
FFFFFFE0
27
.193 - .222
29 (+ 1 router)
255.255.255.224
FFFFFFE0
27
.225 - .254
61 (+ 1 router)
255.255.255.192
FFFFFFC0
26
.1 - .62
61 (+ 1 router)
255.255.255.192
FFFFFFC0
26
.65 - .126
61 (+ 1 router)
255.255.255.192
FFFFFFC0
26
.129 - .190
61 (+ 1 router)
255.255.255.192
FFFFFFC0
26
.193 - .254
125 (+ 1 router)
255.255.255.128
FFFFFF80
25
.1 - .126
125 (+ 1 router)
255.255.255.128
FFFFFF80
25
.129 - .254
254 (+ 1 router)
255.255.255.0
FFFFFF00
24
.1 - .254
Note 1: the router should be the lowest address in the given range.
Note 2: the mask 255.255.255.252 is legal, but it only provides for 2 addresses.