Administrator Guide

CONFIGURATION mode
errdisable recovery interval seconds
NOTE: In Dell EMC Networking OS, for optimal performance of FEFD, the best practice is to set the error disable
recover timer not exceeding 30 seconds with FEFD interval set to default. Thus, avoiding any potential interface flap
and overlapping of recovery timings causing the FEFD enabled interface to stay in error-disabled state for a longer
interval. However, this timer value need to be applied only if the FEFD error-disable mode is set to aggressive mode.
Whenever the Err-disable recovery timer is reconfigured, it will get effective only after the current timer expires. Following message is
displayed after each Err-disable recovery timer configuration:
DellEMC(conf)# errdisable recovery interval 30
New timer interval will be effective from the next timer instance only.
Following is the sample steps to configure the recovery cause and the timer interval for automatic recovery of an interface.
DellEMC# configure termimal
DellEMC(conf)# errdisable recovery cause fefd
DellEMC(conf)# errdisable recovery interval 30
DellEMC(conf)#
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).
Configuring EIS
EIS is compatible with the following protocols: DNS, FTP, NTP, RADIUS, sFlow, SNMP, SSH, Syslog, TACACS, Telnet, and TFTP.
To enable and configure EIS, use the following commands:
1. Enter EIS mode.
CONFIGURATION mode
management egress-interface-selection
2. Configure which applications uses EIS.
EIS mode
application {all | application-type}
NOTE:
If you configure SNMP as the management application for EIS and you add a default management route,
when you perform an SNMP walk and check the debugging logs for the source and destination IPs, the SNMP agent
uses the destination address of incoming SNMP packets as the source address for outgoing SNMP responses for
security.
Interfaces 311