Specifications

Watson-Ethernet-Manual.doc
Version 3.3-01
Watson Ethernet
Operating Manual
Revision: 2010-01-20
3-11
Figure 3-8 shows how Ethernet user interfaces are used for inband manage-
ment:
Figure 3-8: VLAN configuration for Inband Management
For user traffic we have the same configuration as in Figure 3-7. However we
have added one additional VLAN 4094 which is used for inband management.
Ports ETH1 and MGMT3 are members of this VLAN. Because the DSL spans
are not member of VLAN 4094 management traffic is isolated from user traffic
and there is no access to management function through the DSL spans.
Note that port MGMT3 must use untagged packets to properly interface with the
card controller. Management packets coming from the card controller are tagged
with VLAN 4094 upon ingress into the bridging function.
3.2.6 Individual and shared forwarding databases
VLANs can have individual or shared forwarding databases (IVL or SVL opera-
tion). The Watson Ethernet plug-in supports 16 separate forwarding databases
which can be freely assigned to VLANs. Address learning is always done based
on MAC addresses without taking VIDs into account.
IVL is required e.g. if a single server is connected to several Ethernet user ports
on different VLANs and all of the server interfaces use the same MAC address.
In this case the server MAC address will appear to move between Ethernet ports
and VLANs depending upon which interface has most recently transmitted a
frame. Communication to the server will be disrupted