test: ospf redistribute

[troglobit]

More generic test of OSPF redistribute functionality.

Ideas by @jovatn. Could be used for manual testing before corresponding auto-tests are available.
(@mattiaswal to explain more here or re-write :)

• Test that ospf originate default works (example below)
• Test "no summary", e.g., by testing that redistributed routes from backbone area are not visible in "nssa with no-summary"
• Test that redistribution is possible from within NSSA area. E.g., by having a node in NSSA area redistribute a static route and check that routers in backbone sees the route.

OSPF originate default idea

test ospf originate default (including originate default always)

    e1    e0            e0
<---- [A] ---- OSPF ---- [B]
1. Let configure A to "originate default route" (w/o 'always' primitive) in OSPF area
2. B should not have any default route in RIB
3. Add static default route in A, on interface e1
4. Now B should also get a default route via A.

To test with 'always' the same topology can be used.
But then B should see a default route already in step 2.

Documentatation

• Add documentation on redistribute (conntected and static)
• Add documentation on "originate default"
• Add documentation on "router-id"