The trend stats of routing table at JPIX route servers
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1) JPIX operates internet exchange points and route servers in Tokyo and Osaka, Japan. 2) An analysis of routing tables from JPIX route servers shows that the number of IPv4 and IPv6 routes has generally increased over time as more members connect and existing members advertise more routes. 3) The distribution of prefix sizes is dominated by the typical minimum assignment sizes of /24 for IPv4 and /48 for IPv6, though some larger prefixes are present.
![Japan Internet Exchange Co., Ltd.
Masataka MAWATARI <mawatari[at]jpix.ad.jp>
The trend stats of routing table
at JPIX route servers
APRICOT 2017 @ HCMC, Vietnam
Lightning Talk](https://image.slidesharecdn.com/20170302apricot2017-routingtableatrs-mawatari1488434949-170309042013/85/The-trend-stats-of-routing-table-at-JPIX-route-servers-1-320.jpg)
![The number of IPv4 routes (Tokyo RS)
Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 6
members
routes
a new member
started peering
and announced
many routes
an existing
member started
announcing
many routes
[members][routes]
All peers moved
to the new RS
from old one
a new member
started peering
and announced
many routes
2013/01/16
JPIX renewed
route server
2013/07/31
JPIX removed
old route server](https://image.slidesharecdn.com/20170302apricot2017-routingtableatrs-mawatari1488434949-170309042013/85/The-trend-stats-of-routing-table-at-JPIX-route-servers-6-320.jpg)
![Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 7
members
routes
[members][routes]
The number of IPv6 routes (Tokyo RS)
an existing
member started
announcing
many routes
2013/01/16
JPIX renewed
route server
2013/07/31
JPIX removed
old route server](https://image.slidesharecdn.com/20170302apricot2017-routingtableatrs-mawatari1488434949-170309042013/85/The-trend-stats-of-routing-table-at-JPIX-route-servers-7-320.jpg)
![Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 8
The number of IPv4 routes (Osaka RS)
[members][routes]
members
routes
an existing
member started
announcing
many routes
2015/01
JPIX started
Osaka RS service](https://image.slidesharecdn.com/20170302apricot2017-routingtableatrs-mawatari1488434949-170309042013/85/The-trend-stats-of-routing-table-at-JPIX-route-servers-8-320.jpg)
![Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 9
The number of IPv6 routes (Osaka RS)
[members][routes]
an existing
member started
announcing
many routes
members
routes
2015/01
JPIX started
Osaka RS service](https://image.slidesharecdn.com/20170302apricot2017-routingtableatrs-mawatari1488434949-170309042013/85/The-trend-stats-of-routing-table-at-JPIX-route-servers-9-320.jpg)
![Reference: BGP max-prefix-limit
β’ Cisco IOS/IOS-XE
β (config-router)
neighbor <IP address> maximum-prefix <the number of routes> <threshold>
β’ Cisco IOS-XR
β (config-bgp-nbr-af)
neighbor <IP address> maximum-prefix <the number of routes> <threshold>
β’ Juniper JUNOS
β [edit protocols bgp group <group name>]
set neighbor <IP address> family inet unicast prefix-limit maximum <the number of
routes>
set neighbor <IP address> family inet unicast prefix-limit teardown <threshold>
β’ Brocade Ironware
β (config-bgp)
neighbor <IP address> maximum-prefix <the number of routes> <threshold> [teardown]
Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 11
* please see the configuration guide by network gear venders.](https://image.slidesharecdn.com/20170302apricot2017-routingtableatrs-mawatari1488434949-170309042013/85/The-trend-stats-of-routing-table-at-JPIX-route-servers-11-320.jpg)
![The distribution of IPv4 prefix size (Tokyo RS)
Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 13
[Prefix size]
[Routes]
some routes
greater than /24 exist
οΌas of Sep. 2016οΌ](https://image.slidesharecdn.com/20170302apricot2017-routingtableatrs-mawatari1488434949-170309042013/85/The-trend-stats-of-routing-table-at-JPIX-route-servers-13-320.jpg)
![Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 14
οΌas of Sep. 2016οΌ
The distribution of IPv6 prefix size (Tokyo RS)
[Routes]
[Prefix size]
some routes
greater than /48
exists
the number of /32 (minimum allocation size) routes
is fewer than /48 (minimum assignment size)](https://image.slidesharecdn.com/20170302apricot2017-routingtableatrs-mawatari1488434949-170309042013/85/The-trend-stats-of-routing-table-at-JPIX-route-servers-14-320.jpg)
![Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 15
The distribution of IPv4 prefix size (Osaka RS)
[Routes]
[Prefix size]
οΌas of Sep. 2016οΌ](https://image.slidesharecdn.com/20170302apricot2017-routingtableatrs-mawatari1488434949-170309042013/85/The-trend-stats-of-routing-table-at-JPIX-route-servers-15-320.jpg)
![Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 16
The distribution of IPv6 prefix size (Osaka RS)
[Routes]
[Prefix size]
οΌas of Sep. 2016οΌ](https://image.slidesharecdn.com/20170302apricot2017-routingtableatrs-mawatari1488434949-170309042013/85/The-trend-stats-of-routing-table-at-JPIX-route-servers-16-320.jpg)
The trend stats of routing table at JPIX route servers
- 1. Japan Internet Exchange Co., Ltd. Masataka MAWATARI <mawatari[at]jpix.ad.jp> The trend stats of routing table at JPIX route servers APRICOT 2017 @ HCMC, Vietnam Lightning Talk
- 2. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 2 Osaka Nagoya Meieki Metropolitan TOKYO Otemachi Nihonbashi Toyosu Tennozu Otemachi 2nd JPIX switchs are deployed at 3 areas in Japan
- 3. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 3 Osaka Nagoya Meieki Otemachi Nihonbashi Toyosu Tennozu Otemachi 2nd JPIX operates 2 IX segments in Japan JPIX TOKYO Segment JPIX OSAKA Segment Nagoya Meieki site can offer Tokyo vlan and Osaka vlan as well. *1 *1
- 4. The route server operated at JPIX Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 4 IX switch Route Server Routes announced from AS64500 Routes announced from AS64501 Routes announced from AS64502 RS client 1 (AS64500) RS client 2 (AS64501) RS client 3 (AS64502) JPIX route server transparently announces all routes received from all RS clients, JPIX members peering with the route server, for every RS clients. Thatβs a service policy for JPIX route server. announcing all routes received from all route clients announcing all routes received from all route clients announcing all routes received from all route clients
- 5. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 5 Increasing the number of routes
- 6. The number of IPv4 routes (Tokyo RS) Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 6 members routes a new member started peering and announced many routes an existing member started announcing many routes [members][routes] All peers moved to the new RS from old one a new member started peering and announced many routes 2013/01/16 JPIX renewed route server 2013/07/31 JPIX removed old route server
- 7. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 7 members routes [members][routes] The number of IPv6 routes (Tokyo RS) an existing member started announcing many routes 2013/01/16 JPIX renewed route server 2013/07/31 JPIX removed old route server
- 8. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 8 The number of IPv4 routes (Osaka RS) [members][routes] members routes an existing member started announcing many routes 2015/01 JPIX started Osaka RS service
- 9. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 9 The number of IPv6 routes (Osaka RS) [members][routes] an existing member started announcing many routes members routes 2015/01 JPIX started Osaka RS service
- 10. Findings from research about the number of routes β’ About IPv4 routes at Tokyo RS, there were some period of decreasing routes, but it was temporary. Growing the routing table approx. 4,000 routes per year. β’ About IPv6 routes at Tokyo RS, there is a strong possibility to happen big changes depending on the changing BGP policy by members using RS. β’ About both IPv4 and IPv6 routes at Osaka, the number of members is fewer than Tokyo now. But it will be similar trend of Tokyo with increasing the number of members. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 10
- 11. Reference: BGP max-prefix-limit β’ Cisco IOS/IOS-XE β (config-router) neighbor <IP address> maximum-prefix <the number of routes> <threshold> β’ Cisco IOS-XR β (config-bgp-nbr-af) neighbor <IP address> maximum-prefix <the number of routes> <threshold> β’ Juniper JUNOS β [edit protocols bgp group <group name>] set neighbor <IP address> family inet unicast prefix-limit maximum <the number of routes> set neighbor <IP address> family inet unicast prefix-limit teardown <threshold> β’ Brocade Ironware β (config-bgp) neighbor <IP address> maximum-prefix <the number of routes> <threshold> [teardown] Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 11 * please see the configuration guide by network gear venders.
- 12. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 12 The distribution of prefix size
- 13. The distribution of IPv4 prefix size (Tokyo RS) Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 13 [Prefix size] [Routes] some routes greater than /24 exist οΌas of Sep. 2016οΌ
- 14. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 14 οΌas of Sep. 2016οΌ The distribution of IPv6 prefix size (Tokyo RS) [Routes] [Prefix size] some routes greater than /48 exists the number of /32 (minimum allocation size) routes is fewer than /48 (minimum assignment size)
- 15. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 15 The distribution of IPv4 prefix size (Osaka RS) [Routes] [Prefix size] οΌas of Sep. 2016οΌ
- 16. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 16 The distribution of IPv6 prefix size (Osaka RS) [Routes] [Prefix size] οΌas of Sep. 2016οΌ
- 17. β’ About Tokyo, some prefixes greater than minimum assignment size (IPv4: /24, IPv6: /48) exist. β’ There is little relationship between the number of members peering with RS and the distribution of the prefix size. /24 (IPv4) and /48 (IPv6) is the highest in both Tokyo and Osaka. β’ The trend of prefix size distribution will be changed by IPv4 address transfer and IPv6 usage. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 17 Findings from research about the distribution of the prefix size
- 18. Conclusion β’ The routing table trend at JPIX route server has the almost same aspect as the global internet routing table. β’ Please inform your peers, and let IXes (as operators of RS you do peering) know in advance, when the number of advertised routes will be changed much. β’ Please keep your prefixes data in PeeringDB up-to-date. ο Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 18
- 19. Copyright Β© 2017 Japan Internet Exchange Co., Ltd. 19