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BGPQ3(8) System Manager's Manual BGPQ3(8) NAME bgpq3 -- bgp filtering automation tool SYNOPSIS bgpq3 [-h host[:port]] [-S sources] [-EPz] [-f asn | -F fmt | -G asn -t] [-2346ABbDdJjNnsXU] [-a asn] [-r len] [-R len] [-m max] [-W len] OBJECTS [...] [EXCEPT OBJECTS] DESCRIPTION The bgpq3 utility used to generate configurations (prefix-lists, ex- tended access-lists, policy-statement terms and as-path lists) based on RADB data. The options are as follows: -2 accept routes registered for as23456 (transition-as) (default: false) -3 assume that your device is asn32-safe. -4 generate IPv4 prefix/access-lists (default). -6 generate IPv6 prefix/access-lists (IPv4 by default). -A try to aggregate prefix-lists as much as possible (not all out- put formats supported). -a asn specify what asn shall be denied in case of empty prefix-list (OpenBGPD) or included in empty as-list (JunOS). -B generate output in OpenBGPD format (default: Cisco) -b generate output in BIRD format (default: Cisco). -d enable some debugging output. -D use asdot notation for Cisco as-path access-lists. -E generate extended access-list (Cisco), policy-statement term using route-filters (Juniper), [ip|ipv6]-prefix-list (Nokia) or prefix-sets (OpenBGPd). -f number generate input as-path access-list (use 0 to not enforce first AS) -F fmt generate output in user-defined format. -G number generate output as-path access-list. -h host[:port] host running IRRD database (default: whois.radb.net). -J generate config for Juniper (default: Cisco). -j generate output in JSON format (default: Cisco). -l name name of generated entry. -L limit limit recursion depth when expanding as-sets. -m len maximum prefix-length of accepted prefixes (default: 32 for IPv4 and 128 for IPv6). -M match extra match conditions for Juniper route-filters. -n generate config for Nokia SR OS MD-CLI (Cisco IOS by default) -N generate config for Nokia SR OS classic CLI (Cisco IOS by de- fault). -p accept routes registered for private ASNs (default: disabled) -P generate prefix-list (default, backward compatibility). -r len allow more specific routes starting with specified masklen too. -R len allow more specific routes up to specified masklen too. -s generate sequence numbers in IOS-style prefix-lists. -S sources use specified sources only (recommended: RADB,RIPE,APNIC). -t generate as-sets for OpenBGPD (OpenBSD 6.4+), BIRD and JSON formats, as-list-groups for Juniper (JunOS 21+). -T disable pipelining. -W len generate as-path strings of no more than len items (use 0 for inifinity). -U generate config for Huawei devices (Cisco IOS by default) -X generate config for Cisco IOS XR devices (plain IOS by de- fault). -z generate route-filter-lists (JunOS 16.2+). OBJECTS means networks (in prefix format), autonomous systems, as-sets and route-sets. EXCEPT OBJECTS those objects will be excluded from expansion. EXAMPLES Generating named juniper prefix-filter for AS20597: ~>bgpq3 -Jl eltel AS20597 policy-options { replace: prefix-list eltel { 81.9.0.0/20; 81.9.32.0/20; 81.9.96.0/20; 81.222.128.0/20; 81.222.192.0/18; 85.249.8.0/21; 85.249.224.0/19; 89.112.0.0/19; 89.112.4.0/22; 89.112.32.0/19; 89.112.64.0/19; 217.170.64.0/20; 217.170.80.0/20; } } For Cisco we can use aggregation (-A) flag to make this prefix-filter more compact: ~>bgpq3 -Al eltel AS20597 no ip prefix-list eltel ip prefix-list eltel permit 81.9.0.0/20 ip prefix-list eltel permit 81.9.32.0/20 ip prefix-list eltel permit 81.9.96.0/20 ip prefix-list eltel permit 81.222.128.0/20 ip prefix-list eltel permit 81.222.192.0/18 ip prefix-list eltel permit 85.249.8.0/21 ip prefix-list eltel permit 85.249.224.0/19 ip prefix-list eltel permit 89.112.0.0/18 ge 19 le 19 ip prefix-list eltel permit 89.112.4.0/22 ip prefix-list eltel permit 89.112.64.0/19 ip prefix-list eltel permit 217.170.64.0/19 ge 20 le 20 - you see, prefixes 89.112.0.0/19 and 89.112.32.0/19 now aggregated into single entry 89.112.0.0/18 ge 19 le 19. Well, for Juniper we can generate even more interesting policy-options, using -M <extra match conditions>, -R <len> and hierarchical names: ~>bgpq3 -AJEl eltel/specifics -r 29 -R 32 -M "community blackhole" AS20597 policy-options { policy-statement eltel { term specifics { replace: from { community blackhole; route-filter 81.9.0.0/20 prefix-length-range /29-/32; route-filter 81.9.32.0/20 prefix-length-range /29-/32; route-filter 81.9.96.0/20 prefix-length-range /29-/32; route-filter 81.222.128.0/20 prefix-length-range /29-/32; route-filter 81.222.192.0/18 prefix-length-range /29-/32; route-filter 85.249.8.0/21 prefix-length-range /29-/32; route-filter 85.249.224.0/19 prefix-length-range /29-/32; route-filter 89.112.0.0/17 prefix-length-range /29-/32; route-filter 217.170.64.0/19 prefix-length-range /29-/32; } } } } generated policy-option term now allows all specifics with prefix- length between /29 and /32 for eltel networks if they match with spe- cial community blackhole (defined elsewhere in configuration). Of course, this version supports IPv6 (-6): ~>bgpq3 -6l as-retn-6 AS-RETN6 no ipv6 prefix-list as-retn-6 ipv6 prefix-list as-retn-6 permit 2001:7fb:fe00::/48 ipv6 prefix-list as-retn-6 permit 2001:7fb:fe01::/48 [....] and support for ASN 32 is also here ~>bgpq3 -J3f 112 AS-SPACENET policy-options { replace: as-path-group NN { as-path a0 "^112(112)*$"; as-path a1 "^112(.)*(1898|5539|8495|8763|8878|12136|12931|15909)$"; as-path a2 "^112(.)*(21358|23456|23600|24151|25152|31529|34127|34906)$"; as-path a3 "^112(.)*(35052|41720|43628|44450|196611)$"; } } see AS196611 in the end of the list ? That's AS3.3 in 'asplain' nota- tion. For non-ASN32 capable routers you should not use switch -3, and the re- sult will be next: ~>bgpq3 -f 112 AS-SPACENET no ip as-path access-list NN ip as-path access-list NN permit ^112(_112)*$ ip as-path access-list NN permit ^112(_[0-9]+)*_(1898|5539|8495|8763)$ ip as-path access-list NN permit ^112(_[0-9]+)*_(8878|12136|12931|15909)$ ip as-path access-list NN permit ^112(_[0-9]+)*_(21358|23456|23600|24151)$ ip as-path access-list NN permit ^112(_[0-9]+)*_(25152|31529|34127|34906)$ ip as-path access-list NN permit ^112(_[0-9]+)*_(35052|41720|43628|44450)$ AS196611 is no more in the list, however, AS23456 (transition AS) would be added to list if it were not present. USER-DEFINED FORMAT If you want to generate configuration not for routers, but for some other programs/systems, you may use user-defined formatting, like in example below: user@host:~>bgpq3 -F "ipfw add pass all from %n/%l to any\n" as3254 ipfw add pass all from 62.244.0.0/18 to any ipfw add pass all from 91.219.29.0/24 to any ipfw add pass all from 91.219.30.0/24 to any ipfw add pass all from 193.193.192.0/19 to any Recognized format characters: %n - network, %l - mask length, %N - ob- ject name, %m - object mask and %i - inversed mask. Recognized escape characters: \n - new line, \t - tabulation. Please note that no new lines inserted automatically after each sentence, you have to add them into format string manually, elsewhere output will be in one line (sometimes it makes sense): user@host:~>bgpq3 -6F "%n/%l; " as-eltel 2001:1b00::/32; 2620:4f:8000::/48; 2a04:bac0::/29; 2a05:3a80::/48; DIAGNOSTICS When everything is OK, bgpq3 generates access-list to standard output and exits with status == 0. In case of errors they are printed to stderr and program exits with non-zero status. SEE ALSO http://www.radb.net/ Routing Arbiter project http://tools.ietf.org/html/draft-michaelson-4byte-as-representation-05 for information on 'asdot' and 'asplain' notations. http://www.cisco.com/en/US/docs/ios/12_0s/release/ntes/120SNEWF.html#wp3521658 for information on Cisco implementation of ASN32. AUTHOR Alexandre Snarskii <snar@snar.spb.ru> FreeBSD ports 15.0 Oct 27, 2008 BGPQ3(8)
NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | USER-DEFINED FORMAT | DIAGNOSTICS | SEE ALSO | AUTHOR
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