Wireless Printer advertising printer service
The following procedure depicts an advertising service process for a wireless printer in the form of an example.
Procedure
- Wireless Printer 2 sends an mDNS response advertising printer services in VLAN 3.
- Switch 2 does not have any inbound filter in VLAN 3, so it receives the wireless printer service announcement.
- Switch 2 checks the outbound filter in VLAN 3. There is no specific outbound filter on VLAN 3, so it floods the service announcement in VLAN 3 (except at the source port.)
- Switch 2 checks the reflection status. Since switch 2 is not enabled, switch 2 does not forward.
- As there is no inbound filter
in VLAN 3 of switch 1, it receives the service announcement on VLAN
3. When switch 1 checks the outbound filter in VLAN 3, there is
deny operation for service type wireless printer
error message. Therefore switch 1 will not flood the packet in VLAN 3. - Switch 1 checks the reflection status. The reflection is enabled on VLAN 2 and 3 however VLAN 3 is incoming so the reflection will not function. In VLAN 2 it checks the outbound filter. There is no outbound filter in VLAN 2 so switch 1 forwards the service announcement in VLAN 2.
- Switch 3 does not have any inbound filter therefore It receives service announcements in VLAN 2.
- Switch 2 checks the outbound
filter in VLAN 2. As there is no specific outbound filter, the global
action is to
permit all
so switch 2 floods the packet in VLAN 2 (except the source port.) - Host 2 receives the switch 2 print service announcement.