Last week of February 2015, Franck Simon, managing director at the internet exchange point called France-IX, delivered three presentations about the Best Common Practices for IXPs. This third and last presentation goes into the details of the practices to be used by the members of the internet exchanges.

1. Best Common Practices
for members connected to
IXPs
Franck Simon – France IX Services
fsimon@franceix.net

2. BCP for members
• You
need
to
have
an
ASN
J
• Keep
in
mind
that
by
default
you
will
not
get
a
full
Internet
rou;ng
table
on
the
IXP
you
are
connected
to
(except
if
the
IXP
does
allow
private
user
groups
–
private
VLANs
–
and
IP
transit
on
it).
• You
are
not
allowed
to
adver;ze
neither
any
default
route
(or
the
default
route)
neither
the
full
Internet
table
:
you
shall
only
adver;ze
your
own
customers/
users
routes
on
the
IXPs.
2

3. BCP for members
• Keep
in
mind
the
IXP
is
a
layer-­‐2
infrastructure.
You
shall
not
propagate
any
internal
elements
from
your
own
LAN/network
to
the
IXP.
– On
members
routers,
toward
the
IXP:
• no
discovery
protocols
• no
IGP
protocols
• no
spanning
tree
ac;vated
on
the
port
of
the
equipment
connected
to
the
IXP
• no
proxy
ARP
3

4. BCP for members
• Don’t
send
Mul;cast
over
the
Unicast
peering
VLAN
!
• Show
only
one
MAC
address
to
the
IXP
(not
the
various
MAC
addresses
of
your
LAN)
• Apply
IN/OUT
routes
filtering
on
your
connec;on
port
to
the
IXP
:
– IN
:
deny
the
default
route,
and
some
specific
routes
(bogons…)
– OUT
:
only
send
the
routes
of
your
own
customers
and
do
not
re-­‐adver;ze
third
party
routes
4

5. • Do
not
hesitate
to
use
the
BGP
routes
service
provided
by
the
IXP,
and
check
about
the
BGP
communi;es
proposed
by
the
IXP
to
bring
you
with
more
flexibility.
• Do
not
hesitate
to
secure
your
BGP
sessions
(both
sessions
with
members
and
routes
servers):
authen;ca;on
passwords
on
sessions
• Use
the
stats
(especially
Ne_low/sFlow
stats
when
provided
by
the
IXP),
to
enhance
your
rou;ng
policy
and
iden;fy
the
main
players
you
have
traffic
with.
5
BCP for members

6.
Ques;ons
???
6
BCP for members