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border routers should conditionally announce default into OSPF

RESOLVED FIXED

Status

mozilla.org Graveyard
Server Operations
--
minor
RESOLVED FIXED
9 years ago
2 years ago

People

(Reporter: mrz, Assigned: dmoore)

Tracking

Details

(Whiteboard: ETA 02/12, URL)

(Reporter)

Description

9 years ago
border routers shouldn't announce default route into OSPF unless they have external connectivity.
(Reporter)

Updated

9 years ago
Assignee: server-ops → mrz
Component: Server Operations → Server Operations: Projects
(Reporter)

Updated

9 years ago
(Reporter)

Updated

8 years ago
Assignee: mrz → dmoore
(Reporter)

Updated

8 years ago
Component: Server Operations: Projects → Server Operations
(Reporter)

Updated

8 years ago
Whiteboard: ETA 01/29
(Reporter)

Comment 1

8 years ago
Need to schedule this - missed it on 01/29.  Paste in config snippet for review?
(Reporter)

Updated

8 years ago
Whiteboard: ETA 01/29 → ETA 02/12
(Reporter)

Updated

8 years ago
Group: infra
(Assignee)

Comment 2

8 years ago
We'll be basing our conditional default routes on the presence of a core route from at least one of our three service providers.

The default-originate route-map must match on a route explicitly present in the routing table. Unfortunately, AS path and next-hop information are not valid parameters in this scenario.

We've chosen two core routes from each provider, routes which are integral to their backbones and extremely unlikely to disappear from BGP announcements:

Mzima:
  67.201.0.0/18
  72.37.128.0/18

GNI:
  64.127/96.0/19
  64.147.160.0/19

Level3:
  4.0.0.0/8
  62.67.0.0/16

As long as we are receiving one of these routes (from *any* source), we assume we still have a viable connection to the internet at large. The router will inject a default route into our internal OSPF areas as long as any of these provider routes are being learned via BGP.
(Assignee)

Comment 3

8 years ago
ip access-list standard bgp-test-routes
  permit 67.201.0.0 0.0.63.255
  permit 72.37.128.0 0.0.63.255
  permit 64.127.96.0 0.0.31.255
  permit 64.147.160.0 0.0.31.255
  permit 4.0.0.0
  permit 62.67.0.0 0.0.255.255

route-map bgp-active permit 10
  match ip address bgp-test-routes

router ospf 1
  default-information originate always route-map bgp-active
(Assignee)

Comment 4

8 years ago
Changes applied to border1 and border2
Status: NEW → RESOLVED
Last Resolved: 8 years ago
Resolution: --- → FIXED
Product: mozilla.org → mozilla.org Graveyard
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