Port Mapping
Page 19-66
Port Mapping
The OmniS/R began as an any-to-any switching device, connecting different
LAN
interfaces,
such as Ethernet As networks grew and the traffic on them increased, a need arose for
controlling some traffic, such as broadcasts. Virtual
LAN
s, or
VLAN
s, were introduced to
segment traffic such that devices could only engage in switched communication with other
devices in the same
VLAN
.
Some applications today require a further degree of traffic segmentation than that provided by
VLAN
s. The port mapping feature allows you to further segment traffic
within
a
VLAN
or
group by isolating a set of ports.
Groups/VLANs and Port Mapping
Port mapping does
not
affect existing group or AutoTracker
VLAN
operations in a switch.
Group and
VLAN
membership are checked and applied before port mapping constraints are
applied. Therefore, any constraints applied by port mapping only limit traffic flow
within
a
group or
VLAN
; port mapping parameters do not provide any additional connectivity to a port.
So if you add a port to a port mapping set, that port will be first subject to the constraints of
its Group/
VLAN
and then the restrictions imposed by port mapping. Up to 128 port mapping
sets can be configured per switch.
The illustration below helps show how group and port mapping constraints interact. The
ports in slot 2 and 5 (2/1—2/4 and 5/1—5/4) are part of group 3. By group membership, all
of these ports have switched communication with each other. Likewise, the ports in slot 3 and
slot 4 have switched communication with each other as they all belong to group 2.
Groups and Port Mapping
Once a port mapping set is constructed, communication within each of the groups becomes
more restricted. A port mapping set consists of
ingress
and
egress
ports; ingress ports can only
send traffic to egress ports. In the above figure, all ports on slots 2 and 3 are ingress ports and
ports on slots 4 and 5 are egress ports.
OmniS/R
2/1
Group 2
4/1
4/4
5/1
5/2
5/3
5/4
4/2
4/3
Group 3
2/2
3/1
3/2
3/3
3/4
2/3
2/4
Port Map 1 Egress Ports
Port
Map 1
Ingress
Ports
Port
Map 2
Ingress
Ports
Port Map 2 Egress Ports
Summary of Contents for Omni Switch/Router
Page 1: ...Part No 060166 10 Rev C March 2005 Omni Switch Router User Manual Release 4 5 www alcatel com ...
Page 4: ...page iv ...
Page 110: ...WAN Modules Page 3 40 ...
Page 156: ...UI Table Filtering Using Search and Filter Commands Page 4 46 ...
Page 164: ...Using ZMODEM Page 5 8 ...
Page 186: ...Displaying and Setting the Swap State Page 6 22 ...
Page 202: ...Creating a New File System Page 7 16 ...
Page 270: ...Displaying Secure Access Entries in the MPM Log Page 10 14 ...
Page 430: ...OmniChannel Page 15 16 ...
Page 496: ...Configuring Source Route to Transparent Bridging Page 17 48 ...
Page 542: ...Dissimilar LAN Switching Capabilities Page 18 46 ...
Page 646: ...Application Example DHCP Policies Page 20 30 ...
Page 660: ...GMAP Page 21 14 ...
Page 710: ...Viewing the Virtual Interface of Multicast VLANs Page 23 16 ...
Page 722: ...Application Example 5 Page 24 12 ...
Page 788: ...Viewing UDP Relay Statistics Page 26 24 ...
Page 872: ...The WAN Port Software Menu Page 28 46 ...
Page 960: ...Deleting a PPP Entity Page 30 22 ...
Page 978: ...Displaying Link Status Page 31 18 ...
Page 988: ...Displaying ISDN Configuration Entry Status Page 32 10 ...
Page 1024: ...Backup Services Commands Page 34 14 ...
Page 1062: ...Diagnostic Test Cable Schematics Page 36 24 ...
Page 1072: ...Configuring a Switch with an MPX Page A 10 ...
Page 1086: ...Page B 14 ...
Page 1100: ...Page I 14 Index ...