Created
May 28, 2021 18:09
-
-
Save discorev/36b2ae7d170b6c1e8767ea990a7d68ff to your computer and use it in GitHub Desktop.
Modified rfc3442 classes routes script that includes removing old routes
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| # set classless routes based on the format specified in RFC3442 | |
| # e.g.: | |
| # new_rfc3442_classless_static_routes='24 192 168 10 192 168 1 1 8 10 10 17 66 41' | |
| # specifies the routes: | |
| # 192.168.10.0/24 via 192.168.1.1 | |
| # 10.0.0.0/8 via 10.10.17.66.41 | |
| RUN="yes" | |
| if [ "$RUN" = "yes" ]; then | |
| # clean old static routes | |
| if [ "$reason" = "RENEW" -o "$reason" = "REBIND" -o "$reason" = "EXPIRE" ] | |
| then | |
| if [ -n "$old_rfc3442_classless_static_routes" ] | |
| then | |
| if [ "$old_rfc3442_classless_static_routes" != "$new_rfc3442_classless_static_routes" ] | |
| then | |
| set -- $old_rfc3442_classless_static_routes | |
| while [ $# -gt 0 ]; do | |
| net_length=$1 | |
| via_arg='' | |
| case $net_length in | |
| 32|31|30|29|28|27|26|25) | |
| net_address="${2}.${3}.${4}.${5}" | |
| gateway="${6}.${7}.${8}.${9}" | |
| shift 9 | |
| ;; | |
| 24|23|22|21|20|19|18|17) | |
| net_address="${2}.${3}.${4}.0" | |
| gateway="${5}.${6}.${7}.${8}" | |
| shift 8 | |
| ;; | |
| 16|15|14|13|12|11|10|9) | |
| net_address="${2}.${3}.0.0" | |
| gateway="${4}.${5}.${6}.${7}" | |
| shift 7 | |
| ;; | |
| 8|7|6|5|4|3|2|1) | |
| net_address="${2}.0.0.0" | |
| gateway="${3}.${4}.${5}.${6}" | |
| shift 6 | |
| ;; | |
| 0) # default route | |
| net_address="0.0.0.0" | |
| gateway="${2}.${3}.${4}.${5}" | |
| shift 5 | |
| ;; | |
| *) # error | |
| return 1 | |
| ;; | |
| esac | |
| # take care of link-local routes | |
| if [ "${gateway}" != '0.0.0.0' ]; then | |
| via_arg="via ${gateway}" | |
| fi | |
| # remove route | |
| vtysh -c "configure terminal" -c "no ip route ${net_address}/${net_length} ${via_arg} ${interface}" >/dev/null 2>&1 | |
| done | |
| fi | |
| fi | |
| fi | |
| if [ "$reason" = "BOUND" -o "$reason" = "RENEW" -o "$reason" = "REBOOT" -o "$reason" = "REBIND" ] | |
| then | |
| if [ -n "$new_rfc3442_classless_static_routes" ] | |
| then | |
| set -- $new_rfc3442_classless_static_routes | |
| while [ $# -gt 0 ]; do | |
| net_length=$1 | |
| via_arg='' | |
| case $net_length in | |
| 32|31|30|29|28|27|26|25) | |
| net_address="${2}.${3}.${4}.${5}" | |
| gateway="${6}.${7}.${8}.${9}" | |
| shift 9 | |
| ;; | |
| 24|23|22|21|20|19|18|17) | |
| net_address="${2}.${3}.${4}.0" | |
| gateway="${5}.${6}.${7}.${8}" | |
| shift 8 | |
| ;; | |
| 16|15|14|13|12|11|10|9) | |
| net_address="${2}.${3}.0.0" | |
| gateway="${4}.${5}.${6}.${7}" | |
| shift 7 | |
| ;; | |
| 8|7|6|5|4|3|2|1) | |
| net_address="${2}.0.0.0" | |
| gateway="${3}.${4}.${5}.${6}" | |
| shift 6 | |
| ;; | |
| 0) # default route | |
| net_address="0.0.0.0" | |
| gateway="${2}.${3}.${4}.${5}" | |
| shift 5 | |
| ;; | |
| *) # error | |
| return 1 | |
| ;; | |
| esac | |
| # take care of link-local routes | |
| if [ "${gateway}" != '0.0.0.0' ]; then | |
| via_arg="via ${gateway}" | |
| fi | |
| # set route (ip detects host routes automatically) | |
| vtysh -c "configure terminal" -c "ip route ${net_address}/${net_length} ${via_arg} ${interface}" >/dev/null 2>&1 | |
| done | |
| fi | |
| fi | |
| fi |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment