Users Guide

takes a preference for ip1 as source IP and uses the management network to reach the destination. If the management port is down or the
route lookup in EIS routing table fails, ip2 is the source IP and the front-panel port is used to reach the destination. The fallback route
between the management and data networks is used in such a case. At any given time, end users can access Dell Networking OS
applications using either ip1 or ip2. Return traffic for such end-user-originated sessions destined to management port ip1 is handled using
the EIS route lookup.
Handling of Transit Traffic (Traffic Separation)
This is forwarded traffic where destination IP is not an IP address configured in the switch.
• Packets received on the management port with destination on the front-end port is dropped.
• Packets received on the front-end port with destination on the management port is dropped.
• A separate drop counter is incremented for this case. This counter is viewed using the netstat command, like all other IP layer
counters.
Consider a scenario in which ip1 is an address assigned to the management port and ip2 is an address assigned to any of the front panel
port of a switch. End users on the management and front panel port networks are connected. In such an environment, traffic received in
the management port destined on the data port network is dropped and traffic received in the front-end port destined on the
management network is dropped.
Mapping of Management Applications and Traffic Type
The following table summarizes the behavior of applications for various types of traffic when the management egress interface selection
feature is enabled.
Table 34. Mapping of Management Applications and Traffic Type
Traffic type /
Application type
Switch initiated traffic Switch-destined traffic Transit Traffic
EIS Management
Application
Management is the preferred
egress port selected based on route
lookup in EIS table. If the
management port is down or the
route lookup fails, packets are
dropped.
If source TCP/UDP port matches a
management application and source IP address
is management port IP address, management
port is the preferred egress port selected based
on route lookup in EIS table. If management port
is down or route lookup fails, packets are
dropped
Traffic from management
port to data port and
from data port to
management port is
blocked
Non-EIS
management
application
Front-end default route will take
higher precedence over
management default route and SSH
session to an unknown destination
uses the front-end default route
only. No change in the existing
behavior.
If source TCP/UDP port matches a
management application and the source IP
address is a management port IP address, the
management port is the preferred egress port
selected based on route lookup in EIS table. If
the management port is down or the route
lookup fails, packets are dropped
Traffic from management
port to data port and
from data port to
management port is
blocked
• EIS is enabled implies that EIS feature is enabled and the application might or might not be configured as a management application
• EIS is disabled implies that either EIS feature itself is disabled or that the application is not configured as a management application
Transit Traffic
348
Internet Group Management Protocol (IGMP)