DE-CIX ASEAN GlobePEER Route Server Guide

DE-CIX PS Team Updated by DE-CIX PS Team

The DE-CIX ASEAN route service (see RFC 7947 for a detailed description) facilitates the exchange of BGP announcements between peers at DE-CIX ASEAN. The route service consists of a pair of route servers for redundancy purposes. Each peer just needs to set up a BGP session per IP address family to the route servers in order to receive BGP announcements from other participating peers.

The software utilized to provide the service is BIRD. Of the two route servers, technically only one is required. However, in order to make full use of the route service, every peer is strongly encouraged to connect to both machines for redundancy purposes, so that if one machine is out of service (e.g. planned maintenance), the route service remains available.

BGP Session Parameters

This following table provides a brief overview of the BGP session parameters to connect to the route servers:

RS1.ASE.DE-CIX.NET

103.162.254.252

2001:df6:480::94f9:a:1

RS2.ASE.DE-CIX.NET

103.162.254.253

2001:df6:480::94f9:a:2

ASN

38137

AS-SET

IPv4: AS38137:AS-DECIX-ASE

IPv6: AS38137:AS-DECIX-ASE-V6

Receive limit route server (our side)

IPv4: 40,000

IPv6: 20,000

Recommended route limit (your side)

IPv4: 250,000

IPv6: 90,000

BGP Announcement Filtering (Your Side)

You can safely accept any BGP announcements received via all route servers as DE-CIX ASEAN filters all incoming BGP announcements from all peers. The filtering mechanism is described in the section "DE-CIX ASEAN Side".

If you additionally want to filter on your side based on AS-SETs, you can do so by using one or more of the following AS-SETs:

AS-SET

Purpose

AS38137:AS-DECIX-ASE

AS-SETs of all DE-CIX ASEAN customers (IPv4)

AS38137:AS-DECIX-ASE-V6

AS-SETs of all DE-CIX ASEAN customers (IPv6)

AS38137:AS-DECIX-ASE-CONNECTED

ASNs of all DE-CIX ASEAN customers

BGP Announcement Filtering (DE-CIX Side)

The route servers filter all routes based RPKI and IRRDB data as well as various other route hygiene criteria. RPKI and IRRDB filtering is based on the AS-SET the peer has provided. The AS-SET can be changed by contacting Customer Service.

Check your advertised routes in the DE-CIX ASEAN GlobePEER Looking Glass! Filtering might occur due to the reasons mentioned below.
You can find more information on how to use the DE-CIX ASEAN GlobePEER Looking Glass here.

How and what the route servers filter

DE-CIX ASEAN filters are updated every 6 hours. Don't forget to register your IP prefixes in the Internet Routing Registry (IRR) database well in advance (at least 24h before announcing the first time).

Bogon and Martian filtering

Please make sure not to announce routes that:

  • are > /24 (IPv4) and > /48 (IPv6) (RFC 7454)
  • have a different BGP next-hop than the IP of your own router
  • are bogons/martians (private and reserved IP prefixes as defined by RFC 1918, RFC 2544, RFC 3927, RFC 5735, RFC 6598 and RFC 6890)
  • are a DE-CIX peering LAN or a peering LAN of any of DE-CIX's operated IXPs (please also do not announce any of our peering LANs in the DFZ!)
  • contain bogon ASNs in the BGP AS path (private and reserved ASN numbers as defined by RFC 5398, RFC 6793, RFC 6696, RFC 7300 and RFC 7607
  • differ in the leftmost ASN in the AS path from your own ASN
  • have an AS path length > 32
  • are < /8 (IPv4) and < /16 (IPv6)
  • are listed in the Team Cymru Fullbogon list
  • are marked as “never via route servers” in PeeringDB

IRR and RPKI validation

Any routes you announce will also be RPKI (RFC 6811, RFC 7115) validated and checked against Internet Routing Registry data. The AS-SET you provide to us will be recursively resolved. Then filtering is executed as follows:

  • Origin ASN needs to be in customer AS cone. Make sure that your AS-SET is well maintained and that all your downstreams are included.
  • Is the route a blackhole (RFC 7999)?
    • If no, the route undergoes strict RPKI validation filtering (both origin and maximum prefix length (maxLength)):
      • if the result is RPKI Valid, the route is accepted (a missing route object will have no implication in this case)
      • if the result is RPKI Invalid, the route is rejected
      • if the result is RPKI NotFound, we check if the route is resolvable for its origin ASN (this will be the case if a proper route object exists) and it might get accepted or rejected depending on the result**
    • If yes, the route undergoes loose RPKI validation filtering (origin only):
      • if the result is RPKI Valid , the route is accepted
      • if the result is RPKI Invalid, the route is rejected
      • if the result is RPKI NotFound, we check if the route is resolvable for its origin ASN (this will be the case if a proper route object exists) and it might get accepted or rejected depending on the result**

**Loose filtering on IRRDB route objects
We perform loose filtering on IRRDB route objects. For example: If you have a route object for 46.31.120.0/21 we will also accept e.g. 46.31.120.0/22 and other more specifics (up to /24 and up to /32 for blackholes). If this is not a desired behavior, we strongly encourage you to create a ROA and set the maxLength attribute accordingly. As RPKI validation is performed before the IRRDB route object check, it will render all undesired more specifics as RPKI Invalid, which will result in rejection of these. Please note that this method only works for non-blackholes as we perform loose RPKI validation on blackholes (i.e. ignore maxLength).

Best Path Selection Process

Import

The route servers select the best path (best route) according to the following rules:

  1. prefer route with the highest Local Preference attribute (can be set to 0 via GRACEFUL_SHUTDOWN community, default is 100)
  2. prefer route with the shortest AS path
  3. route origin: IGP (i) > EGP (e) > incomplete (?)
  4. prefer the lowest value of the MED (Multiple Exit Discriminator)
    MED is only compared between the same peer ASN (e.g. if you're announcing the same route(s) from ≥ 2 routers)
  5. prefer the oldest known route (implies higher stability)

Each route is evaluated against the rules from top to bottom until a tie breaker is found.

Export

If an export filter is preventing the export of a previously selected best path route (e.g. due to traffic engineering via Action BGP Communities) the second best route (if available) is exported. If the second best route is also rejected on export, the third best route will be exported and so on.

Route Server Control

The route server can be controlled with BGP Communities. For more information, see DE-CIX GlobePEER Route Server Action BGP Communities.

Route Server Route Tagging

We add BGP Communities to all routes to tag additional information like the route ingress, i.e. where it was injected into the DE-CIX ASEAN switching platform. For more details, see DE-CIX GlobePEER Route Server Informational BGP Communities.

Session Types

From an operational point of view, it is advised to set up BGP sessions to both route servers, even if you do not want to peer with (i.e. advertise routes to) the route servers. This helps DE-CIX ASEAN staff to quickly monitor the availability of each peer. We offer two session types:

Session Type

Redistribution?

Routes received?

Looking Glass visibility?

Public

✅

✅

✅

Collector

❌

❌

✅

Public Session (default)

We redistribute all your announcements to other peers while honoring the BGP communities which allow you to restrict your announcements and we advertise all announcements from other peers to you while honoring the BGP communities which allow others peers to restrict their announcements.

Collector Session (on demand)

You do not have to advertise any routes and you will not receive any routes from us on this session. Your session will only be visible in the Looking Glass.

If your decision not to establish BGP sessions with the route servers was made due to your peering policy, please contact us for establishing a collector session.

Example Configurations

The following section contains configurations examples for different router operating systems:

Cisco IOS
    !
    ! Config example for Cisco IOS
    ! Peer and session templates, (S)AFI format and some basic filtering
    ! DE-CIX ASEAN route servers rs1, rs2
    ! Your example ASN: 64500 (replace with your real ASN)
    ! Local preference route servers: 125
    !
    router bgp 64500
     bgp router-id <YOUR_ROUTER_ID>
     ! Requires all your sessions to reset to take effect (if not already enabled)
     bgp graceful-restart
     bgp graceful-restart restart-time 120
     bgp graceful-restart stalepath-time 360
     template peer-policy PP_DECIX_ROUTE_SERVERS_COMMON
      ! Optional: Keep a pre-ingress-route-map copy of the peer table (if you have the memory; useful for debugging)
      soft-reconfiguration inbound
      ! Strip private ASNs from BGP AS path
      remove-private-as
      ! Allow sending of BGP standard communities to control your prefix advertisements
      ! For all available communities, please see "Action BGP Communities"
      send-community
     exit-peer-policy
     !
     template peer-policy PP_DECIX_ROUTE_SERVERS_4
      ! Apply ingress route map
      route-map RM_DECIX_ROUTE_SERVERS_IN in
      ! Apply egress IPv4 route map
      route-map RM_DECIX_ROUTE_SERVERS_OUT_4 out
      ! Please set maximum-prefix limit IPv4 mentioned in the RS Guide/PeeringDB
      ! maximum-prefix <recommended prefix limit (your side) IPv4>
      inherit peer-policy PP_DECIX_ROUTE_SERVERS_COMMON 1
     exit-peer-policy
     !
     template peer-policy PP_DECIX_ROUTE_SERVERS_6
      ! Apply ingress route map
      route-map RM_DECIX_ROUTE_SERVERS_IN in
      ! Apply egress IPv6 route map
      route-map RM_DECIX_ROUTE_SERVERS_OUT_6 out
     ! Please set maximum-prefix limit IPv6 mentioned in the RS Guide/PeeringDB
      ! maximum-prefix <recommended prefix limit (your side) IPv6>
      inherit peer-policy PP_DECIX_ROUTE_SERVERS_COMMON 1
     exit-peer-policy
     !
     template peer-session PS_DECIX_ROUTE_SERVERS
      ! ASN of DE-CIX ASEAN route servers
      remote-as 38137
      ! The route servers are passive and waiting for you side to initiate the sessions
      transport connection-mode active
      ! Use BGP version 4 and skip version negotiation
      version 4
      ! Please do not use aggressive timers (60/180 should be fine) to reduce the risk of flapping sessions
      timers 60 180
     exit-peer-session
     !
     ! Our route servers are transparent: Ignore first AS in AS path not being your peer AS (i.e. 38137)
     no bgp enforce-first-as
     bgp log-neighbor-changes
     neighbor 103.162.254.252 inherit peer-session PS_DECIX_ROUTE_SERVERS
     neighbor 103.162.254.252 description RS1.ASE.DE-CIX.NET
     neighbor 2001:df6:480::94f9:a:1 inherit peer-session PS_DECIX_ROUTE_SERVERS
     neighbor 2001:df6:480::94f9:a:1 description RS1.ASE.DE-CIX.NET
     neighbor 103.162.254.253 inherit peer-session PS_DECIX_ROUTE_SERVERS
     neighbor 103.162.254.253 description RS2.ASE.DE-CIX.NET
     neighbor {{RS2_IPV6}} inherit peer-session PS_DECIX_ROUTE_SERVERS
     neighbor {{RS2_IPV6}} description RS2.ASE.DE-CIX.NET
     !
     address-family ipv4 unicast
      ! Some example IPv4 prefixes to announce
      network 192.0.2.0
      network 198.51.100.0
      network 203.0.113.0
      ! We do not support IPv6 over IPv4 transport
      no neighbor 2001:df6:480::94f9:a:1 activate
      no neighbor {{RS2_IPV6}} activate
      neighbor 103.162.254.252 activate
      neighbor 103.162.254.252 inherit peer-policy PP_DECIX_ROUTE_SERVERS_4
      neighbor 103.162.254.253 activate
      neighbor 103.162.254.253 inherit peer-policy PP_DECIX_ROUTE_SERVERS_4
     exit-address-family
     !
     address-family ipv6 unicast
      ! Some example IPv6 prefixes to announce
      network 2001:DB8:1234::/48
      network 2001:DB8:ABCD::/48
      network 2001:DB8:FFFF::/48
      neighbor 2001:df6:480::94f9:a:1 activate
      neighbor 2001:df6:480::94f9:a:1 inherit peer-policy PP_DECIX_ROUTE_SERVERS_6
      neighbor {{RS2_IPV6}} activate
      neighbor {{RS2_IPV6}} inherit peer-policy PP_DECIX_ROUTE_SERVERS_6
     exit-address-family
    !
    ! Use new BGP community format
    ip bgp-community new-format
    !
    ! We will not advertise IPv4 prefixes less specific than /8 and more specific than /24
    ! Exception: Blackhole next-hop and/or BLACKHOLE Community is set.
    ! Please allow up to /32 if you wish to receive all blackholed prefixes from the route servers
    ! Prefix list example: Allow every IPv4 prefix up to /32 from the route servers
    ip prefix-list PL_DECIX_ROUTE_SERVERS_IN_4 seq 5 permit 0.0.0.0/0 le 32
    !
    ! We will not advertise IPv6 prefixes less specific than /16 and more specific than /48
    ! Exception: Blackhole next-hop and/or BLACKHOLE Community is set.
    ! Please allow up to /128 if you wish to receive all blackholed prefixes from the route servers
    ! Prefix list example: Allow every IPv6 prefix up to /128 from the route servers
    ipv6 prefix-list PL_DECIX_ROUTE_SERVERS_IN_6 seq 5 permit ::/0 le 128
    !
    ! We do not accept IPv4 prefixes less specific than /8 and more specific than /24
    ! Exception: Up to /32 allowed when Blackhole next-hop and/or BLACKHOLE Community is set
    ! Prefix list example: Make sure to only advertise your own IPv4 prefixes/those of your customers
    ip prefix-list PL_DECIX_ROUTE_SERVERS_OUT_4 seq 5 permit 192.0.2.0/24
    ip prefix-list PL_DECIX_ROUTE_SERVERS_OUT_4 seq 10 permit 203.0.113.0/24
    !
    ! We do not accept IPv6 prefixes less specific than /16 and more specific than /48
    ! Exception: Up to /128 allowed when Blackhole next-hop and/or BLACKHOLE Community is set
    ! Prefix list example: Make sure to only advertise your own IPv6 prefixes/those of your customers
    ipv6 prefix-list PL_DECIX_ROUTE_SERVERS_OUT_6 seq 5 permit 2001:DB8:1234::/48
    ipv6 prefix-list PL_DECIX_ROUTE_SERVERS_OUT_6 seq 10 permit 2001:DB8:FFFF::/48
    !
    ! Prefix list example: IPv4 prefixes to blackhole
    ip prefix-list PL_DECIX_BLACKHOLE_OUT_4 seq 5 permit 198.51.100.0/24
    !
    ! Prefix list example: IPv6 prefixes to blackhole
    ipv6 prefix-list PL_DECIX_BLACKHOLE_OUT_6 seq 5 permit 2001:DB8:ABCD::/48
    !
    ! Route-Map example: Set local-preference for route servers to 125
    route-map RM_DECIX_ROUTE_SERVERS_IN permit 10
     match ip address prefix-list PL_DECIX_ROUTE_SERVERS_IN_4
     match ipv6 address prefix-list PL_DECIX_ROUTE_SERVERS_IN_6
     set local-preference 125
    !
    ! Route-Map example:
    ! Use community 0:64501 for not allowing AS64501 to receive your prefixes
    ! Use community 38137:38137 for allowing the route servers to advertise your prefixes to all (other) peers
    ! For all available communities, please see "Action BGP Communities"
    route-map RM_DECIX_ROUTE_SERVERS_OUT_4 permit 10
     match ip address prefix-list PL_DECIX_ROUTE_SERVERS_OUT_4
     set community 38137:38137 0:64501 additive
    !
    ! Route-Map example: Blackhole IPv4 prefixes
    route-map RM_DECIX_ROUTE_SERVERS_OUT_4 permit 20
     match ip address prefix-list PL_DECIX_BLACKHOLE_OUT_4
     set community 38137:38137 additive
     set community 65535:666 additive
    !
    ! Route-Map example:
    ! Use community 0:38137 in combination with 38137:64502 to allow no one except AS64502 to receive your IPv6 prefixes
    route-map RM_DECIX_ROUTE_SERVERS_OUT_6 permit 10
     match ipv6 address prefix-list PL_DECIX_ROUTE_SERVERS_OUT_6
     set community 0:38137 additive
     set community 38137:64502 additive
    !
    ! Route-Map example: Blackhole IPv6 prefixes
    route-map RM_DECIX_ROUTE_SERVERS_OUT_6 permit 20
     match ipv6 address prefix-list PL_DECIX_BLACKHOLE_OUT_6
     set community 38137:38137 additive
     set community 65535:666 additive
    !
Cisco IOS XR
    !!
    !! Config example for Cisco IOS XR
    !! Session-, AF- and neighbor groups as well as some basic filtering
    !! DE-CIX ASEAN route servers rs1, rs2
    !! Your example ASN: 64500 (replace with your real ASN)
    !! Local preference route servers: 125
    !!
    !
    !! We do not accept IPv4 prefixes less specific than /8 and more specific than /24
    !! Exception: Up to /32 allowed when Blackhole next-hop and/or BLACKHOLE Community is set
    !! Prefix set example: Make sure to only advertise your own IPv4 prefixes/those of your customers
    prefix-set PS_DECIX_ROUTE_SERVERS_OUT_4
      192.0.2.0/24,
      203.0.113.0/24
    end-set
    !
    !! We do not accept IPv6 prefixes less specific than /16 and more specific than /48
    !! Exception: Up to /128 allowed when Blackhole next-hop and/or BLACKHOLE Community is set
    !! Prefix set example: Make sure to only advertise your own IPv6 prefixes/those of your customers
    prefix-set PS_DECIX_ROUTE_SERVERS_OUT_6
      2001:db8:1234::/48,
      2001:db8:ffff::/48
    end-set
    !
    !! Prefix set example: IPv4 prefixes to blackhole
    prefix-set PS_DECIX_BLACKHOLE_OUT_4
      198.51.100.0/24
    end-set
    !
    !! Prefix set example: IPv6 prefixes to blackhole
    prefix-set PS_DECIX_BLACKHOLE_OUT_6
      2001:db8:abcd::/48
    end-set
    !
    !! Use this community for allowing the route servers to advertise your prefixes to all peers
    !! For all available communities, please see "Action BGP Communities"
    !! Community set example: Community set for DE-CIX ASEAN "advertise to all peers" community
    community-set CS_DECIX_ADVERTISE_TO_ALL_PEERS
      38137:38137
    end-set
    !
    community-set CS_DECIX_BLACKHOLE
      65535:666
    end-set
    !
    !! We will not advertise IPv4 prefixes less specific than /8 and more specific than /24
    !! Exception: Blackhole next-hop and/or BLACKHOLE Community is set
    !! Please allow up to /32 if you wish to receive all blackholed prefixes from the route servers
    !! Route Policy example: Allow every IPv4 prefix from the route servers and set local preference to 125
    route-policy RPL_DECIX_ROUTE_SERVERS_IN_4
      set local-preference 125
      pass
    end-policy
    !
    !! We will not advertise IPv6 prefixes less specific than /16 and more specific than /48
    !! Exception: Blackhole next-hop and/or BLACKHOLE Community is set
    !! Please allow up to /128 if you wish to receive all blackholed prefixes from the route servers
    !! Route Policy example: Allow every IPv6 prefix from the route servers and set local preference to 125
    route-policy RPL_DECIX_ROUTE_SERVERS_IN_6
      set local-preference 125
      pass
    end-policy
    !
    !! Route Policy example:
    !! Advertise IPv4 prefixes from prefix sets PS_DECIX_ROUTE_SERVERS_OUT_4 and PS_DECIX_BLACKHOLE_OUT_4 (prefixes to blackhole)
    !! Use community 0:64501 for not allowing AS64501 to receive your prefixes
    !! Use community 38137:38137 for allowing the route servers to advertise your prefixes to all (other) peers
    !! Set DE-CIX ASEAN BLACKHOLE Community
    !! For all available communities, please see "Action BGP Communities"
    route-policy RPL_DECIX_ROUTE_SERVERS_OUT_4
      if destination in PS_DECIX_ROUTE_SERVERS_OUT_4 then
        set community CS_DECIX_ADVERTISE_TO_ALL_PEERS additive
        set community (0:64501) additive
        pass
      !! Blackhole IPv4 prefixes
      elseif destination in PS_DECIX_BLACKHOLE_OUT_4 then
        !! Allow all peers to receive your blackholed prefixes
        set community CS_DECIX_ADVERTISE_TO_ALL_PEERS additive
        !! Set BLACKHOLE Community
        set community CS_DECIX_BLACKHOLE additive
        pass
      else
        drop
      endif
    end-policy
    !
    !! Route Policy example:
    !! Advertise IPv6 prefixes from prefix sets PS_DECIX_ROUTE_SERVERS_OUT_6 and PS_DECIX_BLACKHOLE_OUT_6 (prefixes to blackhole)
    !! Use community 0:38137 in combination with 38137:64502 to allow no one except AS64502 to receive your IPv6 prefixes
    !! Set DE-CIX ASEAN BLACKHOLE Community
    route-policy RPL_DECIX_ROUTE_SERVERS_OUT_6
      if destination in PS_DECIX_ROUTE_SERVERS_OUT_6 then
        set community (0:38137) additive
        set community (38137:64502) additive
        pass
      !! Blackhole IPv6 prefixes
      elseif destination in PS_DECIX_BLACKHOLE_OUT_6 then
        !! Allow all peers to receive your blackholed prefixes
        set community CS_DECIX_ADVERTISE_TO_ALL_PEERS additive
        !! Set BLACKHOLE Community
        set community CS_DECIX_BLACKHOLE additive
        pass
      else
        drop
      endif
    end-policy
    !
    router bgp 64500
     bgp router-id <YOUR_ROUTER_ID>
     bgp graceful-restart
     address-family ipv4 unicast
      !! Some example IPv4 prefixes to announce
      network 192.0.2.0/24
      network 198.51.100.0/24
      network 203.0.113.0/24
     !
     address-family ipv6 unicast
      !! Some example IPv6 prefixes to announce
      network 2001:db8:1234::/48
      network 2001:db8:abcd::/48
      network 2001:db8:ffff::/48
     !
     af-group AG_DECIX_ROUTE_SERVERS_4 address-family ipv4 unicast
      !! Allow sending of BGP standard communities to control your prefix advertisements
      !! For all available communities, please see "Action BGP Communities"
      send-community-ebgp
      !! Inbound IPv4 policy
      route-policy RPL_DECIX_ROUTE_SERVERS_IN_4 in
      !! Outbound IPv4 policy
      route-policy RPL_DECIX_ROUTE_SERVERS_OUT_4 out
      !! Please set maximum-prefix limit IPv4 mentioned in the RS Guide/PeeringDB
      !! maximum-prefix <recommended prefix limit (your side) IPv4> 75
      !! Strip private ASNs from BGP AS path
      remove-private-AS
      !! Optional: Keep a pre-ingress-route-map copy of the peer table even if route refresh is supported (if you have the memory; useful for debugging)
      soft-reconfiguration inbound always
     !
     af-group AG_DECIX_ROUTE_SERVERS_6 address-family ipv6 unicast
      !! Allow sending of BGP standard communities to control your prefix advertisements
      !! For all available communities, please see "Action BGP Communities"
      send-community-ebgp
      !! Inbound IPv6 policy
      route-policy RPL_DECIX_ROUTE_SERVERS_IN_6 in
      !! Outbound IPv6 policy
      route-policy RPL_DECIX_ROUTE_SERVERS_OUT_6 out
      !! Please set maximum-prefix limit IPv6 mentioned in the RS Guide/PeeringDB
      !! maximum-prefix <recommended prefix limit (your side) IPv6> 75
      !! Strip private ASNs from BGP AS path
      remove-private-AS
      !! Optional: Keep a pre-ingress-route-map copy of the peer table even if route refresh is supported (if you have the memory; useful for debugging)
      soft-reconfiguration inbound always
     !
     session-group SG_DECIX_ROUTE_SERVERS
      !! ASN of DE-CIX ASEAN route servers
      remote-as 38137
      !! Please do not use aggressive timers (60/180 should be fine) to reduce the risk of flapping sessions
      timers 60 180
      !! Our route servers are transparent: Ignore first AS in AS path not being your peer AS (i.e. 38137)
      enforce-first-as disable
      !! Allow BGP graceful restart
      graceful-restart
      !! The route servers are passive and waiting for you side to initiate the sessions
      session-open-mode active-only
     !
     neighbor-group NG_DECIX_ROUTE_SERVERS_4
      use session-group SG_DECIX_ROUTE_SERVERS
      address-family ipv4 unicast
       use af-group AG_DECIX_ROUTE_SERVERS_4
      !
     !
     neighbor-group NG_DECIX_ROUTE_SERVERS_6
      use session-group SG_DECIX_ROUTE_SERVERS
      address-family ipv6 unicast
       use af-group AG_DECIX_ROUTE_SERVERS_6
      !
     !
     neighbor 103.162.254.252
      use neighbor-group NG_DECIX_ROUTE_SERVERS_4
      description RS1.ASE.DE-CIX.NET
     !
     neighbor 2001:df6:480::94f9:a:1
      use neighbor-group NG_DECIX_ROUTE_SERVERS_6
      description RS1.ASE.DE-CIX.NET
     !
     neighbor 103.162.254.253
      use neighbor-group NG_DECIX_ROUTE_SERVERS_4
      description RS2.ASE.DE-CIX.NET
     !
     neighbor {{RS2_IPV6}}
      use neighbor-group NG_DECIX_ROUTE_SERVERS_6
      description RS2.ASE.DE-CIX.NET
     !
    !
    end

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