# OSPFv3 (IPv6) Topology Test

## Topology
	                                                  -----\
	  SW1 - Stub Net 1            SW2 - Stub Net 2          \
	  fc00:1:1:1::/64             fc00:2:2:2::/64            \
	\___________________/      \___________________/          |
	          |                          |                    |
	          |                          |                    |
	          | ::1                      | ::2                |
	+---------+---------+      +---------+---------+          |
	|        R1         |      |        R2         |          |
	|     FRRouting     |      |     FRRouting     |          |
	| Rtr-ID: 10.0.0.1  |      | Rtr-ID: 10.0.0.2  |          |
	+---------+---------+      +---------+---------+          |
	          | ::1                      | ::2                 \
	           \______        ___________/                      OSPFv3
	                  \      /                               Area 0.0.0.0
	                   \    /                                  /
	             ~~~~~~~~~~~~~~~~~~                           |
	           ~~       SW5        ~~                         |
	         ~~       Switch         ~~                       |
	           ~~  fc00:A:A:A::/64 ~~                         |
	             ~~~~~~~~~~~~~~~~~~                           |
	                     |                 /----              |
	                     | ::3            | SW3 - Stub Net 3  | 
	           +---------+---------+    /-+ fc00:3:3:3::/64   |
	           |        R3         |   /  |                  /
	           |     FRRouting     +--/    \----            /
	           | Rtr-ID: 10.0.0.3  | ::3        ___________/
	           +---------+---------+                       \
	                     | ::3                              \
	                     |                                   \
	             ~~~~~~~~~~~~~~~~~~                           |
	           ~~       SW6        ~~                         |
	         ~~       Switch         ~~                       |
	           ~~  fc00:B:B:B::/64 ~~                          \
	             ~~~~~~~~~~~~~~~~~~                             OSPFv3
	                     |                                   Area 0.0.0.1
	                     | ::4                                 /
	           +---------+---------+       /----              |
	           |        R4         |      | SW4 - Stub Net 4  |
	           |     FRRouting     +------+ fc00:4:4:4::/64   |
	           | Rtr-ID: 10.0.0.4  | ::4  |                   /
	           +-------------------+       \----             /
	                                                   -----/

## FRR Configuration

Full config as used is in r1 / r2 / r3 / r4 / r5 subdirectories

Simplified `R1` config (R1 is similar)

	hostname r1
	!
	interface r1-stubnet vrf r1-cust1
	 ipv6 ospf6 area 0.0.0.0
	 ipv6 address fc00:1:1:1::1/64
	 ipv6 ospf6 network broadcast
	!
	interface r1-sw5 vrf r1-cust1
	 ipv6 ospf6 area 0.0.0.0
	 ipv6 address fc00:a:a:a::1/64
	 ipv6 ospf6 network broadcast
	!
	router ospf6 vrf r1-cust1
	 router-id 10.0.0.1
	 log-adjacency-changes detail
	 redistribute static
	!
	ipv6 route fc00:1111:1111:1111::/64 fc00:1:1:1::1234 vrf r1-cust1

Simplified `R3` config

	hostname r3
	!
	interface r3-stubnet vrf r3-cust1
	 ipv6 ospf6 area 0.0.0.0
	 ipv6 address fc00:3:3:3::3/64
	 ipv6 ospf6 network broadcast
	!
	interface r3-sw5 vrf r3-cust1
	 ipv6 ospf6 area 0.0.0.0
	 ipv6 address fc00:a:a:a::3/64
	 ipv6 ospf6 network broadcast
	!
	interface r3-sw6 vrf r3-cust1
	 ipv6 ospf6 area 0.0.0.1
	 ipv6 address fc00:b:b:b::3/64
	 ipv6 ospf6 network broadcast
	!
	router ospf6 vrf r3-cust1
	 router-id 10.0.0.3
	 log-adjacency-changes detail
	 redistribute static
	!
	ipv6 route fc00:3333:3333:3333::/64 fc00:3:3:3::1234 vrf r3-cust1

## Tests executed

### Check if FRR is running

Test is executed by running 

	vtysh -c "show logging" | grep "Logging configuration for"
	
on each FRR router. This should return the logging information for all daemons registered
to Zebra and the list of running daemons is compared to the daemons started for this test (`zebra` and `ospf6d`)

### Verify for OSPFv3 to converge

OSPFv3 is expected to converge on each view within 60s total time. Convergence is verified by executing (on each node)

	vtysh -c "show ipv6 ospf vrf r1-cust1 neigh"

and checking for "Full" neighbor status in the output. An additional 15 seconds after the full converge is waited for routes to populate before the following routing table checks are executed

### Verifying OSPFv3 Routing Tables

Routing table is verified by running 

	vtysh -c "show ipv6 route vrf r1-cust1"

on each node and comparing the result to the stored example config (see `show_ipv6_route.ref` in r1 / r2 / r3 / r4 directories). Link-Local addresses are masked out before the compare.

### Verifying Linux Kernel Routing Table

Linux Kernel IPv6 Routing table is verified on each FRR node with

	ip -6 route vrf r1-cust1

Tables are compared with reference routing table (see `ip_6_address.ref` in r1 / r2 / r3 / r4 directories). Link-Local addresses are translated after getting collected on each node with interface name to make them consistent