Part 2 (Update): How To Configure Dual ISP Failover on a Cisco Router With a Dynamic IP Address

Channel:

Robert Mayer

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Published on March 7, 2024 6:07:11 PM ● Video Link: https://www.youtube.com/watch?v=LOAFKV9dni0

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Vlog

Duration: 23:14

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25

Just an update to address an issue with a video I released in 2021 titled: " How To Configure Dual ISP Failover on a Cisco Router With a Dynamic Public IP Address".

That video can be found here: https://youtu.be/cbfWjv8s4VA


SAMPLE EEM SCRIPTS
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*** REMEMBER TO CHANGE THE BRACKETED INFORMATION (i.e. [WAN2 INTERFACE HERE], etc) WITH YOUR OWN CONFIG ***

EEM Option 1:
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event manager applet SHUT_NOSHUT_ISP1
event syslog pattern "Interface [WAN2 INTERFACE HERE] assigned DHCP address"
action 1.0 cli command "en"
action 2.0 cli command "conf t"
action 3.0 cli command "[WAN1 INTERFACE HERE]"
action 4.0 cli command "shut"
action 5.0 cli command "no shut"
action 6.0 cli command "exit"
action 7.0 cli command "end"

EEM Option 2:
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event manager applet REFRESH_RMAP
event syslog pattern "Interface [WAN2 INTERFACE HERE] assigned DHCP address"
action 1.0 cli command "en"
action 2.0 cli command "conf t"
action 3.0 cli command "no route-map [ROUTE MAP NAME HERE]"
action 4.0 cli command "route-map [ROUTE MAP NAME HERE]"
action 5.0 cli command "match ip address [ACL HERE]"
action 6.0 cli command "set ip next-hop dynamic dhcp"
action 7.0 cli command "set interface [WAN1 INTERFACE HERE] Null0"
action 8.0 cli command "exit"
action 9.0 cli command "end"

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CHAPTERS
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0:00 - Introduction
0:52 - Discussing the Issue
1:49 - Recap
4:17 - Topology Overview
5:41 - Failover Testing
8:13 - Identifying the Issue
12:33 - Solving the Issue Using EEM Scripts
20:57 - Final Words