Routing Filter conversion v6 to v7

RouterOS RouterOS beta
1

I have noticed when migrating from v6 filters to v7 filter the prefix length 0-32 does not seem to translate properly.

For example this

prefix-length=0-32

translates to

 dst-len > 32

where is my mind it should be

dst-len <= 32
2

I picked up the same, and ended up rewriting all filters…
I’d say the conversion rate is probably close to 20% successful so far.

3

Please list all 80% things that did not convert properly.

4

Here are a few examples. If you would like me to provide you with the full before and after, please let me know how I can send it to you?

  • prefix-length=0-32 changes to dst-len > 32
  • all IPv4 transit routes, ie 0.0.0.0/0 were marked as invalid
  • all IPV6 outbound routes were not advertised

Example1

add action=discard chain=V4-BLOCK-RFC1918 prefix=192.168.0.0/16 prefix-length=0-32

—>

add chain=V4-BLOCK-RFC1918 disabled=no rule=“if (dst in 192.168.0.0/16 && dst-len > 32) { reject; }”

Example2

add action=accept chain=V4-IPT-BGP-IN-AS000000 prefix=0.0.0.0/0 set-bgp-communities=“” set-bgp-local-pref=110 set-route-targets=000000:110
add action=discard chain=V4-IPT-BGP-IN-AS000000

—>

add chain=V4-IPT-BGP-IN-AS000000 disabled=no rule=“reject;”

Example3

add action=accept chain=V6-IPT-BGP-OUT-AS000000 prefix=2000:0000::/32 set-bgp-communities=“”
add action=accept chain=V6-IPT-BGP-OUT-AS000000 prefix=2000:0000::/48 set-bgp-communities=“”
add action=discard chain=V6-IPT-BGP-OUT-AS000000

—>

add chain=V6-IPT-BGP-OUT-AS000000 disabled=no rule=“reject;”

5

What was the first ROSv7 version you upgraded to?
Your examples that supposedly should disappear upgrades correctly

81  chain=test-set rule="if (dst == 2000::/32) { accept; }" 

82  chain=test-set rule="if (dst == 2000::/48) { accept; }" 

83  chain=test-set rule="set bgp-local-pref 110; delete bgp-ext-communities rt; append bgp-ext-communities rt:0:110; accept;"
6

This was from version 6.49.2 (stable) to 7.1 (stable)

7

any list of all filter changes?