Is there a way to set up a single IP SLA to probe multiple destination addresses in a pool, track it & apply track to a static default route? I assume the answer is no. I have seen configs where multiple IP SLA's were configured, each probing one address on internet, a track for each & multiple static default routes configured with one of the tracks applied to each route. That does seem like a good alternative to a "pool of addresses" concept but my routers only take one default route with only one track applied to it. I tried adding a higher admin distance to the second route but the first route got deleted. My goal is to avoid probing 8.8.8.8 by itself since the google DNS server(s) could go down but the broadband circuit & internet be totally working fine. I know that the odds of 8.8.8.8 having a server issue are slim to none but I am trying to avoid failing over to MPLS based on only one address not responding to IP SLA. I also dont want to upgrade the license on the router. Here is my version below.
Router# show version
Cisco IOS XE Software, Version 16.09.01
Cisco IOS Software [Fuji], ISR Software (X86_64_LINUX_IOSD-UNIVERSALK9_IAS-M), Version 16.9.1, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2018 by Cisco Systems, Inc.
Compiled Tue 17-Jul-18 17:03 by mcpre
Cisco IOS-XE software, Copyright (c) 2005-2018 by cisco Systems, Inc.
All rights reserved. Certain components of Cisco IOS-XE software are
licensed under the GNU General Public License ("GPL") Version 2.0. The
software code licensed under GPL Version 2.0 is free software that comes
with ABSOLUTELY NO WARRANTY. You can redistribute and/or modify such
GPL code under the terms of GPL Version 2.0. For more details, see the
documentation or "License Notice" file accompanying the IOS-XE software,
or the applicable URL provided on the flyer accompanying the IOS-XE
software.
ROM: IOS-XE ROMMON
kmbltmplsr1 uptime is 4 weeks, 1 day, 23 hours, 14 minutes
Uptime for this control processor is 4 weeks, 1 day, 23 hours, 17 minutes
System returned to ROM by PowerOn
System restarted at 15:51:33 EST Tue Jan 22 2019
System image file is "bootflash:isr4200-universalk9_ias.16.09.01.SPA.bin"
Last reload reason: PowerOn
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Suite License Information for Module:'esg'
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Suite Suite Current Type Suite Next reboot
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FoundationSuiteK9 None None None
securityk9
appxk9
Technology Package License Information:
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Technology Technology-package Technology-package
Current Type Next reboot
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appxk9 None None None
securityk9 None None None
ipbase ipbasek9 Permanent ipbasek9
The current throughput level is 35000 kbps
cisco ISR4221/K9 (1RU) processor with 1785315K/6147K bytes of memory.
Processor board ID FJC2235A0J2
2 Gigabit Ethernet interfaces
32768K bytes of non-volatile configuration memory.
4194304K bytes of physical memory.
6598655K bytes of flash memory at bootflash:.
0K bytes of WebUI ODM Files at webui:.
Configuration register is 0x2102
