Cisco Cisco StadiumVision Mobile Streamer Maintenance Manual
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Page 7 of 20
Figure 3.
Switch Configuration for DHCP Option 82 and Helper Address
The “ip dhcp snooping vlan …” global configuration command must be
configured for the VLANs where DHCP snooping is desired. This command
currently supports the option to specify one VLAN, a group of comma-separated
VLANs, or a VLAN range.
configured for the VLANs where DHCP snooping is desired. This command
currently supports the option to specify one VLAN, a group of comma-separated
VLANs, or a VLAN range.
For DHCP snooping to be active on a switch, both configuration commands must
be entered. If the general “ip dhcp snooping” is removed from the configuration,
any configured “ip dhcp snooping vlan” commands will remain in the switch
configuration, but DHCP snooping will not function on the switch.
be entered. If the general “ip dhcp snooping” is removed from the configuration,
any configured “ip dhcp snooping vlan” commands will remain in the switch
configuration, but DHCP snooping will not function on the switch.
Option 2 DHCP Snooping Configuration and Trusted
Port
Port
In the three-layer network design (represented as Option 2), the
Cisco Catalyst 3750-E switch that is directly connected to endpoint devices (e.g.
DMPs, IP Phones) is globally configured for DHCP snooping (similar to the
configuration shown in Figure 3).
Cisco Catalyst 3750-E switch that is directly connected to endpoint devices (e.g.
DMPs, IP Phones) is globally configured for DHCP snooping (similar to the
configuration shown in Figure 3).
In addition, the uplink port must be configured to trust the DHCP traffic that
traverses it.
traverses it.
Figure 4.
Switch Configuration for the Uplink as a DHCP Trusted Port