D-Link DXS-5000-54S Emulator - Page 44
traceroute
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5000 Series Layer 2/3 Managed Data Center Switch CLI Reference Guide 4-27 traceroute The traceroute command is used to identify the routes that are actually taken by packets as they travel to their destinations through the network on a hop-by-hop basis. When initiated from the CLl interface, the traceroute command continues to provide a synchronous response. Either the source IP address or the virtual router of the traceroute probes may be specified. It should be noted that the way in which traceroute works is by sending packets that are expected not to reach their final destination but, rather, to trigger ICMP error messages that will be sent back to the source address from each stop along the forward path toward the destination. The user can, by specifying the source address, determine at what point along the forward path a route back to the source address is lacking. It should be noted, however, that this is only useful in the event that the route from the source to the destination and from the destination to the source is symmetric. One common usage, for example, is the sending of a traceroute from an edge router to some target located higher up in the network by use of a source address at a host subnet on the edge router. Doing this allows the user to test whether the location within the network is reachable from the host attached to the edge router. Alternatively, a user could send a traceroute in which an address on a loopback interface serves as the source in order to test reachability from within the network back to the loopback interface address. In the CLI, the source can be specified as an IPv4 address, a virtual router, or a routing interface. In the event that a routing interface is specified as the source, the traceroute is sent via the primary IPv4 address on the source interface. With SNMP, it is required that the source be specified as an address. An incoming packet, such as a traceroute response, that arrives on a routing interface will not be accepted by D-LINK OS if the packet's destination address is located on one of the out-of-band management interfaces (that is, the service port or network port). Similarly, a packet that arrives on a management interface will not be accepted by D-LINK OS if that packet's destination is an address located on a routing interface. As such, it would be pointless to send a traceroute on a management interface while utilizing a routing interface address as the source, or to transmit a traceroute on a routing interface while utilizing a management interface as the source. In other words, if a traceroute is being sent on a routing interface, that routing interface or another routing interface must serve as the source. Similarly, if a traceroute is being sent on a management interface, the source must be located on that management interface. Because of this, a management interface or management interface address cannot be specified as the source by a user. Rather, when a traceroute is being sent on a management interface, a source address should not be specified by the user; instead, the system should be allowed to select the source address from the outgoing interface. traceroute [vrf vrf-name] {ip-address | [ipv6] {ipv6-address | hostname}} [initTtl initTtl] [maxTtl maxTtl] [maxFail maxFail] [interval interval] [count count] [port port] [size size] [source {ip-address | ipv6-address | unit/slot/port}] Parameters By utilizing the options described below, the user can specify the initial and maximum time-to-live (TTL) in probe packets, as well as the size of each probe, the maximum number of failures before termination, and the number of probes sent for each TTL. vrf vrf-name Ip-address ipv6-address (Optional) This parameter indicates the name of the VRF instance from which to initiate the traceroute. Tracerouting can only be accomplished for hosts reachable from within the VRF instance. In the event that a source parameter is specified in concert with a vrf parameter, that parameter must be a member of the VRF. Relatedly, it is not possible to use the ipv6 parameter in conjunction with the vrf parameter. The value for the ipaddress should be a valid IP address. The value for the ipv6-address should be a valid IPv6 address. 38
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1,136
-
1,137
-
1,138
-
1,139
-
1,140
-
1,141
-
1,142
-
1,143
-
1,144
-
1,145
-
1,146
-
1,147
-
1,148
-
1,149
-
1,150
-
1,151
-
1,152
-
1,153
-
1,154
-
1,155
-
1,156
-
1,157
-
1,158
-
1,159
-
1,160
-
1,161
-
1,162
-
1,163
-
1,164
-
1,165
-
1,166
-
1,167
-
1,168
-
1,169
-
1,170
-
1,171
-
1,172
-
1,173
-
1,174
-
1,175
-
1,176
-
1,177
-
1,178
-
1,179
-
1,180
-
1,181
-
1,182
-
1,183
-
1,184
-
1,185
-
1,186
-
1,187
-
1,188
-
1,189
-
1,190
-
1,191
-
1,192
-
1,193
-
1,194
-
1,195
-
1,196
-
1,197
-
1,198
-
1,199
-
1,200
-
1,201
-
1,202
-
1,203
-
1,204
-
1,205
-
1,206
-
1,207
-
1,208
-
1,209
-
1,210
-
1,211
-
1,212
-
1,213
-
1,214
-
1,215
-
1,216
-
1,217
-
1,218
-
1,219
-
1,220
-
1,221
-
1,222
-
1,223
-
1,224
-
1,225
-
1,226
-
1,227
-
1,228
-
1,229
-
1,230
-
1,231
-
1,232
-
1,233
-
1,234
-
1,235
-
1,236
-
1,237
-
1,238
-
1,239
-
1,240
-
1,241
-
1,242
-
1,243
-
1,244
-
1,245
-
1,246
-
1,247
-
1,248
-
1,249
-
1,250
-
1,251
-
1,252
-
1,253
-
1,254
-
1,255
-
1,256
-
1,257
-
1,258
-
1,259
-
1,260
-
1,261
-
1,262
-
1,263