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--- tools:brt [2019/11/21 18:45] – created veera
+++ tools:brt [2019/11/21 20:06] (current) – [4.1 Convert the MRT format update file to a format acceptable by brt using bgpdump] veera
@@ Line 5: / Line 5: @@
-. Download BRT from http://caia.swin.edu.au/tools/bgp/brt/downloads.html
+===== 1. Download BRT =====
+You can find it here http://caia.swin.edu.au/tools/bgp/brt/downloads.html
+<note important>
+**Error with mp_ methods**
+There seems to be an issue with the Net::BGP module.
+We are getting the following error with version 0.2  ''Can't locate object method "mp_unreach_nlri" via package "Net::BGP::Update" at brt-0.2.pl line 263, <$fh> line 2.''
+As a hack you can comment out the mp_unreach_nlri and mp_reach_nlri , you will lose the multipath updates.
+</note>
+===== 2. Install the Perl Net::BGP module =====
-. Install the Perl Net::BGP module
 <code>
@@ Line 13: / Line 33: @@
 </code>
-. On router under test
+===== 3. On router under test =====
+Add the BRT as a peer say with AS 300
+Lets say the router has an  AS 400
-say it has AS 400
 <code>
 sh bgp neighbors
@@ Line 24: / Line 47: @@
 </code>
+===== 4. Prepare a route update file =====
+Download a route update file in MRT format. The easiest way is to download from a collector see http://archive.routeviews.org/
+==== 4.1 Convert the MRT format update file to a format acceptable by brt using bgpdump ====
+BRT tool needs a human readable BGP update file
+''
+ BGP update file in human readable with Unix format (bgpdump -m option)
+''
+Convert the file using bgpdump
+<code>
+bgpdump -m updates.20191101.0130  > updates.20191101.0130.bgpdump
+</code>
+===== 5. Now you can inject routes into the router table. =====
+Run BRT , use the -v to keep an eye on errors.
+<code>
+sudo perl brt-0.2.pl  -brtas 300 -brtip 192.168.3.33 -peeras 400 -peerip 192.168.3.200 -f ~/updates.20191101.0130.bgpdump -v
+</code>
+Use the following command on the router
+<code>
+sh ip route
+sh bgp summ
+sh bgp neighbors
+</code>
+BRT is a useful tool to test Trisul ISP (needs license)