Frequently Asked Questions
Q: How do I contact the SIX for non-urgent issues?
A: Email info _a_t_ seattleix.net.
Q: How do I contact SIX Network Operations?
A: For service-affecting problems, please email noc _a_t_ seattleix.net.
For non-urgent issues please email info _a_t_ seattleix.net.
Q: What mailing lists are available for participants?
A: The mailing lists available are:
||How to subscribe
||Moderated announcements list for people who aren't on the
members list but need to hear about important SIX related matters
(maintenance, meetings, etc.) from the SIX admins. All messages
to this list are automatically sent to the members list too, so
no need to subscribe to both. Member to member communication
should be done using the members list or your own private list
||Optional list for participants to freely discuss
Seattle Internet issues. Examples of acceptable discussion include:
offers/requests for surplus equipment, sharing of tips/tricks,
building gossip, etc.
||Intended to be low volume so that all technical
contacts remain subscribed. Notices of maintenance work, SIX
organization discussion and upcoming meetings are appropriate for
||For discussion of multicast over the SIX.
A: The physical location (no postal mail!) is Westin Office
Building, 19th floor, 2001 6th Avenue, Seattle. NPA-NXX is 206-443.
The mailing address is Seattle Internet Exchange, Inc., 1700 7th
Ave Ste 116 #400, Seattle, WA 98101-1323.
Q: MAC Address Changes?
A: If you are going to perform maintenance that results in a
possible MAC address change for packets sent from your router,
please coordinate with email@example.com in advance, or you
risk being cut off. We can allow multiple specific MAC addresses
temporarily, to enable transition.
In an emergency, if you are cut off, feel free to force your
router to use the MAC address that was previously working for
At a technical level, different participants are governed by
different MACL policies depending on how they are connected. If
you are on an extension, your connection is likely governed by a
MACL. Except in specific cases where we have coordinated with a
participant, participants connected to core switches generally
have automatic MACLs or no MACL at all.
How participants are connected (core vs. extension) is detailed
in the "Switch" column of:
Q: Where do I go for an address allocation or to change the
reverse DNS for an existing address allocation?
A: To change your existing address allocation, email info _a_t_
seattleix.net. For new participants, once your connection is up, you
can request an allocation by sending the following to info _a_t_
Organization URL (or Peering Policy page if available):
Reverse DNS FQDN: (ex. six.example.net)
IPv6: (yes or no)
Multicast: (yes or no)
Q: What connection types and speeds are available?
A: You can connect via single-mode fiber. Available speeds
are 1 Gbps, 10 Gbps and port-channel multiples. LACP is supported.
http://www.seattleix.net/join.htm for more information.
Q: What is the cost of connecting to the SIX?
A: The SIX donor model makes it so there is
no fee for an organization's first GigE port, but multi-GigE and 10GE
ports may involve a
one-time port fee. The SIX does not charge recurring fees and is run
entirely by volunteers.
The building management or your colocation provider will likely
charge you for the cost of labor and materials for running a circuit
to the SIX, and may charge you a recurring fee.
Q: What are the rules?
A: Please check out
Q: Any tips on configuring my router?
A: The Amsterdam IX provides a helpful configuration guide for
exchange point participants here. A
variety of hardware is covered.
For Cisco hardware, one possible exception to their advice concerns
disabling "keepalive". We recommend you evaluate for yourself whether
this should be disabled or not. Some say the GigE standard makes it
unnecessary and thus recommend "no keepalive". Otherwise, we suggest
no ip gratuitous-arps
no ipv6 source route
no cdp enable
no mop enable
udld port disable
no ip directed-broadcast
no ip redirects
no ip proxy-arp
ipv6 nd suppress-ra (if 'ipv6 nd ra suppress' does not work)
ipv6 nd ra suppress (if 'ipv6 nd suppress-ra' does not work)
no ipv6 mfib forwarding
no ipv6 mld router
no ipv6 pim
no ipv6 redirects
Q: What size MTU is supported?
A: All of the participants are using a 1500 byte MTU on their
ports. This is the standard for public Ethernet-based exchanges.
Q: Does the SIX maintain a looking glass?
A: No, but
Packet Clearing House does. Check out: http://lg.pch.net/
Q: What is the organizational structure of the SIX?
The Seattle Internet Exchange, Inc. is a Washington State non-profit
corporation. Our articles of incorporation, bylaws, and minutes of
official meetings are available at
http://www.seattleix.net/docs/. The SIX is an IRS 501(c)(6)
income tax exempt organization.
Q: Who is on the SIX board and who are the officers?
A: Check out the Who's Who.
Q: How may an organization contribute to the SIX?
A: Funds may be contributed to the SIX via PayPal (paypal _a_t_
seattleix.net) or via check to Seattle Internet Exchange, Inc.,
1700 7th Ave Ste 116 #400, Seattle, WA 98101-1323. For credit cards,
PayPal can be used. If you would like to contribute hardware, either
to be used by the SIX or sold with the proceeds going to the SIX,
please email info _a_t_ seattleix.net to discuss options. Donors are
recognized on the contributors page.
Contributions are not deductible as charitable contributions for
federal income tax purposes. They may be deductible as trade or
business expenses if ordinary and necessary in the conduct of the
taxpayer's business. The SIX is a 501(c)(6) income tax exempt
Q: SIX logo?
Comments/corrections/suggestions/additions to webmaster
at seattleix.net please.