mirror/bgp-bgpq4
1
0
Fork 0
mirror of https://github.com/bgp/bgpq4.git synced 2024-05-11 05:55:05 +00:00
Code Releases Activity

Make note of Ben's extra aggregation trick

Browse Source
This commit is contained in:
Job Snijders
2021-08-19 16:02:03 +00:00
parent da750ed48f
commit 675155356d
1 changed files with 29 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
IDEAS Normal file
View File

@ -0,0 +1,29 @@
Ben Maddison taught me another aggregation trick:
route-set: AS37271:RS-EXAMPLE
mp-members: 192.0.2.0/27
mp-members: 192.0.2.32/27
mp-members: 192.0.2.64/27
mp-members: 192.0.2.96/27
mp-members: 192.0.2.128/26
mp-members: 192.0.2.128/27
mp-members: 192.0.2.160/27
mp-members: 192.0.2.192/27
mp-members: 192.0.2.224/27
descr: Example route-set
mnt-by: MAINT-AS37271
changed: benm@workonline.africa 20210819
source: RADB
BGPQ4 produces the following:
$ bgpq4 -A AS37271:RS-EXAMPLE
no ip prefix-list NN
ip prefix-list NN permit 192.0.2.0/25 ge 27 le 27
ip prefix-list NN permit 192.0.2.128/26 le 27
ip prefix-list NN permit 192.0.2.192/26 ge 27 le 27
But the following aggregation also is valid, and shorter:
ip prefix-list NN permit 192.0.2.0/24 ge 27 le 27
ip prefix-list NN permit 192.0.2.128/26