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Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

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Egress Interface Selection (EIS)

EIS allows you to isolate the management and front-end port domains by preventing switch-initiated traffic routing between the two domains. This feature provides additional security by preventing flooding attacks on front-end ports. The following protocols support EIS: DNS, FTP, NTP, RADIUS, sFlow, SNMP, SSH, Syslog, TACACS, Telnet, and TFTP. This feature does not support sFlow on stacked units.

When you enable this feature, all management routes (connected, static, and default) are copied to the management EIS routing table. Use the management route command to add new management routes to the default and EIS routing tables. Use the show ip management-eis-route command to view the EIS routes.

Important Points to Remember

  • Deleting a management route removes the route from both the EIS routing table and the default routing table.
  • If the management port is down or route lookup fails in the management EIS routing table, the outgoing interface is selected based on route lookup from the default routing table.
  • If a route in the EIS table conflicts with a front-end port route, the front-end port route has precedence.
  • Due to protocol, ARP packets received through the management port create two ARP entries (one for the lookup in the EIS table and one for the default routing table).

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