Enterprise QoS Solution Reference Network Design Guide

More documents

Recommendations

Info

Catalyst 2950—QoS Considerations and Design 2-20 Enterprise QoS Solution Reference Network Design Guide Chapter 2 Campus QoS Design A possible workaround to this limitation would be to pre-set the port(s) to be used by SoftPhone within the application itself. In such a case, these ports would have to be discretely matched by ACL entries on the Catalyst 2950. Furthermore, each port being used for call signaling would also require a discrete ACL entry. However, even in the case where all these ports are buttoned down and discrete ACLs are configured on the Catalyst 2950 to match them, another limitation of the switch would come into play. Specifically, the Catalyst 2950 can only support policing in 1 Mbps increments on FastEthernet ports. Such lax policing would leave a fairly large hole to allow unauthorized traffic that may be mimicking Voice or call signaling to be admitted onto the network. Due to these limitations, it is not recommended to use a Catalyst 2950 to support an untrusted PC running SoftPhone. Catalyst 2950—Untrusted Server with Scavenger-Class QoS Model Configuration This section includes the following topics: Configuration Catalyst MLS QoS Verification Commands For the most part, the Catalyst 2950 can support the Untrusted Multi-Application Server + Scavenger Model as illustrated in Figure 2-5. Only the final element of the logical model, namely the policing of all other traffic to 1 Mbps (remarking traffic in excess of this limit to CS1) is not supported on the Catalyst 2950. The main platform-specific caveats that should be kept in mind when deploying this model on the Catalyst 2950 are the following: Non-standard DSCP values are not supported; therefore, Mission-Critical Data traffic cannot be marked to DSCP 25 on Catalyst 2950s (a temporary recommendation during the interim of Cisco’s call signaling marking migration from AF31 to CS3); such application traffic can alternatively be marked to the more general class of Transactional Data (AF21), of which they are a subset. The mls qos cos override interface command must be used to ensure that untrusted CoS values are explicitly set 0 (default). The range keyword cannot be used in the ACLs being referenced by the class-maps; server-ports should be explicitly defined with a separate access list entry (ACE) per TCP/UDP port. User-defined masks must be consistent for all ACLs being referenced by class maps (if filtering is being done against TCP/UDP ports, then all Access Control Entries (ACEs) should be set to filter by TCP/UDP ports, as opposed to some ACEs filtering by ports and others by subnet or host addresses). System-defined masks (such as permit ip any any) cannot be used in conjunction with user-defined masks (such as permit tcp any any eq 3200) within the same policy map; therefore, if some traffic is being matched against TCP/UDP ports, then a final ACL cannot be used to match all other traffic via a permit ip any any statement). The Catalyst 2950 IOS implementation of MQC’s class-default does not (at the time of writing) function compatibly with mainline IOS; class-default should apply a policy to all other traffic not explicitly defined, but testing has shown that this is not the case. Version 3.3
Chapter 2 Campus QoS Design Version 3.3 Catalyst 2950—QoS Considerations and Design Example 2-3 Catalyst 2950—Untrusted Multi-Application Server with Scavenger-Class QoS Model Configuration CAT2950(config)#class-map SAP CAT2950(config-cmap)# match access-group name SAP CAT2950(config-cmap)#class-map LOTUS CAT2950(config-cmap)# match access-group name LOTUS CAT2950(config-cmap)#class-map IMAP CAT2950(config-cmap)# match access-group name IMAP CAT2950(config-cmap)#exit CAT2950(config)# CAT2950(config)#policy-map UNTRUSTED-SERVER CAT2950(config-pmap)# class SAP CAT2950(config-pmap-c)# set ip dscp 18 ! DSCP 25 is not supported CAT2950(config-pmap-c)# police 15000000 8192 exceed-action dscp 8 ! Out-of-profile Mission-Critical is marked down to Scavenger (CS1) CAT2950(config-pmap-c)# class LOTUS CAT2950(config-pmap-c)# set ip dscp 18 ! Transactional is marked AF21 CAT2950(config-pmap-c)# police 35000000 8192 exceed-action dscp 8 ! Out-of-profile Transactional Data is marked down to Scavenger (CS1) CAT2950(config-pmap-c)# class IMAP CAT2950(config-pmap-c)# set ip dscp 10 ! Bulk Data is marked AF11 CAT2950(config-pmap-c)# police 50000000 8192 exceed-action dscp 8 ! Out-of-profile Bulk Data is marked down to Scavenger (CS1) CAT2950(config-pmap-c)#exit CAT2950(config-pmap)#exit CAT2950(config)# CAT2950(config)#interface FastEthernet0/1 CAT2950(config-if)# mls qos cos override ! Untrusted CoS is remarked to 0 CAT2950(config-if)# service-policy input UNTRUSTED-SERVER CAT2950(config-if)#exit CAT2950(config)# CAT2950(config)#ip access list extended SAP CAT2950(config-ext-nacl)# permit tcp any eq 3200 any CAT2950(config-ext-nacl)# permit tcp any eq 3201 any CAT2950(config-ext-nacl)# permit tcp any eq 3202 any CAT2950(config-ext-nacl)# permit tcp any eq 3203 any CAT2950(config-ext-nacl)# permit tcp any eq 3600 any CAT2950(config-ext-nacl)# CAT2950(config-ext-nacl)#ip access list extended LOTUS CAT2950(config-ext-nacl)# permit tcp any eq 1352 any CAT2950(config-ext-nacl)# CAT2950(config-ext-nacl)#ip access list extended IMAP CAT2950(config-ext-nacl)# permit tcp any eq 143 any CAT2950(config-ext-nacl)# permit tcp any eq 220 any CAT2950(config-ext-nacl)#end CAT2950# Catalyst MLS QoS Verification Commands show mls qos interface policers This section includes the following Catalyst MLS verification commands: show mls qos interface policers show class-map and show policy-map show mls masks qos The show mls qos interface policers verification command reports all configured policers attached to the specified interface. Enterprise QoS Solution Reference Network Design Guide 2-21
Page 1 and 2:
Enterprise QoS Solution Reference N
Page 3 and 4:
Version 3.3 Preface xiii Revision H
Page 5 and 6:
Version 3.3 Enterprise QoS Solution
Page 7 and 8:
Version 3.3 Catalyst 6500 CatOS QoS
Page 9 and 10:
Version 3.3 Cisco Documentation 3-4
Page 11 and 12:
Version 3.3 QoS Baseline (11-Class)
Page 13 and 14:
Version 3.3 Preface Revision Histor
Page 15 and 16:
Preface Version 3.3 Cisco Systems A
Page 17 and 18:
Preface Version 3.3 Obtaining Addit
Page 19 and 20:
QoS Overview What is QoS? Version 3
Page 21 and 22: Chapter 1 Quality of Service Design
Page 53 and 54: QoS Design Overview Version 3.3 Cam
Page 55 and 56: Chapter 2 Campus QoS Design Version
Page 57 and 58: Chapter 2 Campus QoS Design Call Si
Page 59 and 60: Chapter 2 Campus QoS Design Trusted
Page 63 and 64: Chapter 2 Campus QoS Design Cisco I
Page 65 and 66: Chapter 2 Campus QoS Design AutoQoS
Page 69 and 70: Chapter 2 Campus QoS Design Catalys
Page 71: Chapter 2 Campus QoS Design Version
Page 81 and 82: Chapter 2 Campus QoS Design Figure
Page 113 and 114: Chapter 2 Campus QoS Design show ml
Page 115 and 116: Chapter 2 Campus QoS Design Figure
Page 123 and 124:
Chapter 2 Campus QoS Design Version
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Chapter 2 Campus QoS Design show qo
Page 141 and 142:
Chapter 2 Campus QoS Design show qo
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Chapter 2 Campus QoS Design Catalys
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Chapter 2 Campus QoS Design WS-X674
Page 155 and 156:
Chapter 2 Campus QoS Design Configu
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Chapter 2 Campus QoS Design Referen
Page 179 and 180:
Version 3.3 WAN Aggregator QoS Desi
Page 181 and 182:
Chapter 3 WAN Aggregator QoS Design
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Page 203 and 204:
Page 205 and 206:
Page 207 and 208:
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Version 3.3 Branch Router QoS Desig
Page 231 and 232:
Chapter 4 Branch Router QoS Design
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
Page 245 and 246:
Page 247 and 248:
Page 249 and 250:
Page 251 and 252:
Page 253 and 254:
Version 3.3 MPLS VPN QoS Design CHA
Page 255 and 256:
Chapter 5 MPLS VPN QoS Design Versi
Page 257 and 258:
Chapter 5 MPLS VPN QoS Design Servi
Page 259 and 260:
Chapter 5 MPLS VPN QoS Design Call-
Page 261 and 262:
Page 263 and 264:
Page 265 and 266:
Page 267 and 268:
Page 269 and 270:
Page 271 and 272:
Page 273 and 274:
Chapter 5 MPLS VPN QoS Design Short
Page 275 and 276:
Page 277 and 278:
Page 279 and 280:
Page 281 and 282:
Page 283 and 284:
Page 285 and 286:
Chapter 5 MPLS VPN QoS Design Books
Page 287 and 288:
Version 3.3 IPSec VPN QoS Design CH
Page 289 and 290:
Chapter 6 IPSec VPN QoS Design Vers
Page 291 and 292:
Page 293 and 294:
Page 295 and 296:
Chapter 6 IPSec VPN QoS Design Pref
Page 297 and 298:
Chapter 6 IPSec VPN QoS Design Dela
Page 299 and 300:
Chapter 6 IPSec VPN QoS Design QoS
Page 301 and 302:
Page 303 and 304:
Chapter 6 IPSec VPN QoS Design Anti
Page 305 and 306:
Page 307 and 308:
Page 309 and 310:
Page 311 and 312:
Page 313 and 314:
Page 315 and 316:
Page 317 and 318:
Chapter 6 IPSec VPN QoS Design Digi
Page 319 and 320:
Chapter 6 IPSec VPN QoS Design DSL
Page 321 and 322:
Page 323 and 324:
Page 325 and 326:
Page 327 and 328:
Chapter 6 IPSec VPN QoS Design Summ
Page 329 and 330:
Chapter 6 IPSec VPN QoS Design Book
show all

Enterprise QoS Solution Reference Network Design Guide

Create successful ePaper yourself

Delete template?

Save as template?