{"id":1690,"date":"2018-11-14T12:41:38","date_gmt":"2018-11-14T19:41:38","guid":{"rendered":"http:\/\/jim-zimmerman.com\/?p=1690"},"modified":"2018-11-14T12:41:38","modified_gmt":"2018-11-14T19:41:38","slug":"cisco-3750-switch-multiple-failover-static-routes","status":"publish","type":"post","link":"https:\/\/jim-zimmerman.com\/?p=1690","title":{"rendered":"Cisco 3750 switch – multiple failover static routes"},"content":{"rendered":"

I needed to set up a few fail over routes in case an intermediate route became unavailable. And I needed to do this for two different scenarios. <\/p>\n

Create your IP SLAs:<\/p>\n

ip sla 1
\n icmp-echo 10.10.10.111 source-ip 10.10.10.123
\n timeout 1000
\n threshold 2
\n frequency 3
\nip sla schedule 1 life forever start-time now<\/p><\/blockquote>\n

This is ping testing 10.10.10.111 from 10.10.10.123 to verify that the primary hop is available.<\/p>\n

ip sla 2
\n icmp-echo 10.10.11.222 source-ip 10.10.22.123
\n timeout 1000
\n threshold 2
\n frequency 3
\nip sla schedule 2 life forever start-time now<\/p><\/blockquote>\n

Likewise, this is ping testing 10.10.11.222 from 10.10.22.123 to verify that the primary hop is available.<\/p>\n

Create your routes (Note: The IP security version of IOS is not needed for this.)::<\/p>\n

ip route 0.0.0.0 0.0.0.0 10.10.10.111 track 1
\nip route 0.0.0.0 0.0.0.0 10.10.10.222 10<\/p><\/blockquote>\n

In this case, the default route on the 3750 is to 10.10.10.111, however if it is unavailable, then the default route is to 10.10.10.222.<\/p>\n

However, traffic to 10.10.11.10 and 192.168.0.20 should route to 10.10.11.222 by default and 10.10.11.223 when 10.10.11.222 is unavailable.<\/p>\n

ip route 10.10.11.10 255.255.255.255 10.10.11.222 track 2
\nip route 192.168.0.20 255.255.255.255 10.10.11.222 track 2
\nip route 10.10.11.10 255.255.255.0 10.10.11.223
\nip route 192.168.0.20 255.255.255.0 10.10.11.223<\/p><\/blockquote>\n

Activate the tracks with the following statements:<\/p>\n

track 1 ip sla 1 reachability
\ntrack 2 ip sla 2 reachability<\/p><\/blockquote>\n

Here are some useful commands to look at the configuration\/status:<\/p>\n

#show ip sla application
\n\tIP Service Level Agreement Technologies<\/p>\n

IPSLAs Infrastructure version: Engine-II<\/p>\n

Supported Operation Types:
\n\tdhcp, dns, echo, ftp, http, jitter, mpls jitter, pathEcho
\n\tpathJitter, tcpConnect, udpEcho
\nSupported Features:
\n\tIPSLAs Event Publisher<\/p>\n

IP SLAs low memory water mark: 8441624<\/p>\n

Estimated system max number of entries: 6182
\nEstimated number of configurable operations: 4524
\nNumber of Entries configured : 2
\nNumber of active Entries : 2
\nNumber of pending Entries : 0
\nNumber of inactive Entries : 0<\/p>\n

Last time the operation configuration changed: 17:54:49.625 PST Tue Nov 13 2018<\/p><\/blockquote>\n

#show ip sla configuration
\nIP SLAs, Infrastructure Engine-II<\/p>\n

Entry number: 1
\nOwner:
\nTag:
\nType of operation to perform: echo
\nTarget address: 10.10.10.111
\nSource address: 10.10.10.123
\nRequest size (ARR data portion): 28
\nOperation timeout (milliseconds): 1000
\nType Of Service parameters: 0x0
\nVerify data: No
\nVrf Name:
\nSchedule:
\n Operation frequency (seconds): 3
\n Next Scheduled Start Time: Start Time already passed
\n Group Scheduled : FALSE
\n Randomly Scheduled : FALSE
\n Life (seconds): Forever
\n Entry Ageout (seconds): never
\n Recurring (Starting Everyday): FALSE
\n Status of entry (SNMP RowStatus): Active
\nThreshold (milliseconds): 2
\nDistribution Statistics:
\n Number of statistic hours kept: 2
\n Number of statistic distribution buckets kept: 1
\n Statistic distribution interval (milliseconds): 20
\nHistory Statistics:
\n Number of history Lives kept: 0
\n Number of history Buckets kept: 15
\n History Filter Type: None
\nEnhanced History:<\/p>\n

Entry number: 2
\nOwner:
\nTag:
\nType of operation to perform: echo
\nTarget address: 10.10.11.222
\nSource address: 10.10.22.123
\nRequest size (ARR data portion): 28
\nOperation timeout (milliseconds): 1000
\nType Of Service parameters: 0x0
\nVerify data: No
\nVrf Name:
\nSchedule:
\n Operation frequency (seconds): 3
\n Next Scheduled Start Time: Start Time already passed
\n Group Scheduled : FALSE
\n Randomly Scheduled : FALSE
\n Life (seconds): Forever
\n Entry Ageout (seconds): never
\n Recurring (Starting Everyday): FALSE
\n Status of entry (SNMP RowStatus): Active
\nThreshold (milliseconds): 2
\nDistribution Statistics:
\n Number of statistic hours kept: 2
\n Number of statistic distribution buckets kept: 1
\n Statistic distribution interval (milliseconds): 20
\nHistory Statistics:
\n Number of history Lives kept: 0
\n Number of history Buckets kept: 15
\n History Filter Type: None
\nEnhanced History:<\/p><\/blockquote>\n

#show ip sla statistics<\/p>\n

Round Trip Time (RTT) for\tIndex 1
\nType of operation: icmp-echo
\n\tLatest RTT: 1 ms
\nLatest operation start time: 11:29:19.092 PST Wed Nov 14 2018
\nLatest operation return code: OK
\nNumber of successes: 151
\nNumber of failures: 9
\nOperation time to live: Forever<\/p>\n

Round Trip Time (RTT) for\tIndex 2
\nType of operation: icmp-echo
\n\tLatest RTT: 1 ms
\nLatest operation start time: 11:29:16.634 PST Wed Nov 14 2018
\nLatest operation return code: OK
\nNumber of successes: 663
\nNumber of failures: 26
\nOperation time to live: Forever<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"

I needed to set up a few fail over routes in case an intermediate route became unavailable. And I needed to do this for two different scenarios. Create your IP SLAs: ip sla 1 icmp-echo 10.10.10.111 source-ip 10.10.10.123 timeout 1000 threshold 2 frequency 3 ip sla schedule 1 life forever start-time now This is ping [&hellip<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[475,319,477,476],"class_list":["post-1690","post","type-post","status-publish","format-standard","hentry","category-documentation","tag-475","tag-cisco","tag-failover","tag-route"],"share_on_mastodon":{"url":"","error":""},"_links":{"self":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts\/1690","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1690"}],"version-history":[{"count":2,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts\/1690\/revisions"}],"predecessor-version":[{"id":1692,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts\/1690\/revisions\/1692"}],"wp:attachment":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1690"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1690"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1690"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}