[FROG] Tunnel Encap attribute sub-tlv length

[Abel Alejandro]

Hello,

I have a eBGP with two transit providers and they both died with the same error, as follows:

Jan  7 10:51:59 serveru-1 bgpd[1776]: Tunnel Encap attribute sub-tlv length 48582 exceeds remaining length 28
Jan  7 10:51:59 serveru-1 bgpd[1776]: <IP>: Attribute VNC, parse error
Jan  7 10:51:59 serveru-1 bgpd[1776]: bgp_process_packet: BGP UPDATE receipt failed for peer: <IP>

It seems both providers sent something frr didnt like, is there a way to avoid a shutdown on this case?


serveru-1# show ver
FRRouting 6.0 (serveru-1).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
configured with:
     '--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-silent-rules' '--libexecdir=${prefix}/lib/frr' '--disable-maintainer-mode' '--disable-dependency-tracking' '--enable-exampledir=/usr/share/doc/frr/examples/' '--localstatedir=/var/run/frr' '--sbindir=/usr/lib/frr' '--sysconfdir=/etc/frr' '--disable-snmp' '--enable-ospfapi=yes' '--enable-multipath=256' '--enable-ldpd' '--enable-fpm' '--enable-user=frr' '--enable-group=frr' '--enable-vty-group=frrvty' '--enable-configfile-mask=0640' '--enable-logfile-mask=0640' '--enable-werror' '--with-libpam' '--enable-systemd=yes' '--enable-poll=yes' '--enable-cumulus=no' '--enable-pimd' '--enable-dependency-tracking' '--enable-bgp-vnc=yes' '--disable-rpki' '--enable-bfdd' 'CFLAGS=-g -O2 -fdebug-prefix-map=/home/ci/cibuild.6/debwork/frr-6.0=. -fstack-protector-strong -Wformat -Werror=format-security' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2' 'CXXFLAGS=-g -O2 -fdebug-prefix-map=/home/ci/cibuild.6/debwork/frr-6.0=. -fstack-protector-strong -Wformat -Werror=format-security' 'FCFLAGS=-g -O2 -fdebug-prefix-map=/home/ci/cibuild.6/debwork/frr-6.0=. -fstack-protector-strong' 'FFLAGS=-g -O2 -fdebug-prefix-map=/home/ci/cibuild.6/debwork/frr-6.0=. -fstack-protector-strong' 'GCJFLAGS=-g -O2 -fdebug-prefix-map=/home/ci/cibuild.6/debwork/frr-6.0=. -fstack-protector-strong' 'LDFLAGS=-Wl,-z,relro -Wl,-z,now' 'OBJCFLAGS=-g -O2 -fdebug-prefix-map=/home/ci/cibuild.6/debwork/frr-6.0=. -fstack-protector-strong -Wformat -Werror=format-security' 'OBJCXXFLAGS=-g -O2 -fdebug-prefix-map=/home/ci/cibuild.6/debwork/frr-6.0=. -fstack-protector-strong -Wformat -Werror=format-security' 'build_alias=x86_64-linux-gnu'
serveru-1#