BGP4+ non-transit AS with IBGP

[Interoperability Test Scenario]

Last Update: February 26, 2000

This scenario verifies interoperability when the target ROUTER is attached to the model network.

Subjects:
Verification that router treat the BGP4+.
Verification Points:

Router Sends s packets via shortest route, which is calculated from AS path, for the destination address.

Physical Network Configuration:

                                                          HOST-2
(Net-w) (Prefix 3ffe:501:481d:f006::/64)                    |
         AS 3000                          /        -+-------+------------+----     /
                                AS3000    /         |                    |         /
                                          / (I/F-3w)|                    |(I/F-5w) /
                                          ////// ROUTER-3 /////////// ROUTER-5 /////
                                            (I/F-3x)|                    |(I/F-5v)
                                                    |                    |
(Net-x) (Prefix 3ffe:501:481d:f005::/64)     --+----+---                 |
                                               |                         |
                                               |(I/F-2x)                 |
                                AS2000 ->   ROUTER-2                     |
                                               |(I/F-2y)                 |
                                               |                         |
(Net-y) (Prefix 3ffe:501:481d:f004::/64)      -+-----+----      ---+-----+-- (Net-v)
                                                     |             |
                                                     |(I/F-1y)     |(I/F-4v)
                                          /////// ROUTER-1 //// ROUTER-4 //////////
                                AS1000    /          |(I/F-1z)     |(I/F-4z)      /
                                          /          |             |              /
(Net-z) (Prefix 3ffe:501:481d:f002::/64)  /   -------+------+------+----          /
         AS 1000                                            |
                                                          HOST-1

(Net-v) (Prefix 3ffe:501:481d:f007::/64)

"///" : AS boundary

Network	Prefix	Network media
Net-v	3ffe:501:481d:f007::/64	Ethernet 10BASE-T
Net-w	3ffe:501:481d:f006::/64	Ethernet 10BASE-T
Net-x	3ffe:501:481d:f005::/64	Ethernet 10BASE-T
Net-y	3ffe:501:481d:f004::/64	Ethernet 10BASE-T
Net-z	3ffe:501:481d:f002::/64	Ethernet 10BASE-T

Test Machines:

Machine Comments Initial status Configuration

HOST-2 Reference Machine is attached to Net-w with power turned off. -

ROUTER-3 Reference Machine Power is turned off. I/F-3x is attached to Net-x while I/F-3w is attached to Net-w. AS number is 3000.
BGP ID is 10.21.1.203.
IBGP peer is ROUTER-5.
EBGP peer is AS 2000.
Sends route of link attached to interface I/F-3w.
Doesn't send routing information that ROUTER-5 advertised to AS 2000.
Sends RA to Net-w and Net-x.

ROUTER-5 Reference Machine Power is turned off. I/F-5w is attached to Net-w while I/F-5v is attached to Net-v. AS number is 3000.
BGP ID is 10.21.1.203.
IBGP peer is ROUTER-3.
EBGP peer is AS 1000.
Sends route of link attached to interface I/F-5w.
Doesn't send routing information that ROUTER-3 advertised to AS 1000.
Sends RA to Net-v and Net-w.

ROUTER-2 Reference Machine Power is turned off. I/F-2y is attached to Net-y while I/F-2x is attached to Net-x. AS number is 2000.
EBGP peer is AS 1000 and 3000.
Sends routing information that AS 1000 and 3000 advertised to AS 3000 and 1000.
Sends RA to Net-x and Net-y.
Doesn't send and receive RIPng.

ROUTER-1 Target Machine Power is turned off. I/F-1z is attached to Net-z while I/F-1y is attached to Net-y. AS number is 1000.
BGP ID is 10.21.1.201.
EBGP peer is AS 2000.
IBGP peer is ROUTER-4.
Sends route of link attached to interface I/F-1z.
Doesn't send routing information that ROUTER-4 advertised to AS 2000.
Sends RA to Net-y and Net-z.

ROUTER-4 Reference Machine Power is turned off. I/F-4z is attached to Net-z while I/F-4v is attached to Net-v. AS number is 1000.
BGP ID is 10.21.1.204.
IBGP peer is ROUTER-1.
EBGP peer is AS 3000.
Sends route of link is attached to interface I/F-4z.
Doesn't send routing information that ROUTER-1 advertised to AS 3000.
Sends RA to Net-v and Net-z.

HOST-1 Reference Machine is attached to Net-z with power turned off. -

Detect Protocols:
UDP, ICMP
Applications:
traceroute program (traceroute)

Interoperability Check:

No Action Criteria Comments

1 Boot HOST-1. - -

2 Boot HOST-2. - -

3 Boot ROUTER-1. - -

4 Boot ROUTER-2. - -

5 Boot ROUTER-3. - Check the routing table of Router-1.
Now ROUTER-1, 2 and 3 learn the path between Net-z and Net-w.

Reachability Check

6 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2. -

7 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1. -

Make shorter route

8 Boot ROUTER-4. - -

9 Boot ROUTER-5. - All routers learn the shortest path between Net-z and Net-w.
Check the BGP4+ information and routing information of every router.

Selection shorter route at both direction

10 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-4 -> ROUTER-5 -> HOST-2. -

11 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-5 -> ROUTER-4 -> HOST-1. -

AS3000 controls incoming route using "PREPEND"

12 At ROUTER-5, prepend its AS number twice to the AS path advertising to ROUTER-4
(prepend 2). - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.

13 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2. -

14 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-5 -> ROUTER-4 -> HOST-1. -

15 At ROUTER-3, prepend its AS number twice to the AS path advertising to ROUTER-2
(prepend 2). - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.

16 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-4 -> ROUTER-5 -> HOST-2. -

17 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-5 -> ROUTER-4 -> HOST-1. -

AS1000 controls outbound route using "LOCAL PREFERENCE"

18 At ROUTER-4,
set "local preference =100" for all routes advertised from ROUTER-5. - -

19 At ROUTER-1,
set "local preference =200" for all routes advertised from ROUTER-2. - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.

20 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2. -

21 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-5 -> ROUTER-4 -> HOST-1. -

AS1000 controls inbound route using "PREPEND"

22 At ROUTER-4, prepend its AS number twice to the AS path advertising to ROUTER-5
(prepend 2). - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.

23 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2. -

24 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-2. -

25 At ROUTER-1, prepend its AS number twice to the AS path advertising to ROUTER-2
(prepend 2). - -

26 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2. -

27 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-5 -> ROUTER-4 -> HOST-1. -

At both directions, change route of AS1000 (preparation after action 32)

28 At ROUTER-5 configure the value of local preference with 100 for all route advertised from ROUTER-4. - -

29 At ROUTER-3 configure the value of local preference with 200 for all route advertised from ROUTER-2. - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.

At both directions, route of AS1000 becomes via ROUTER-1 (preparation after action 32)

30 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2. -

31 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1. -

At both directions, route of AS1000 becomes via ROUTER-5

32 Pull off the cable (I/F-2y) from HUB. - -

33 Wait 4 minutes (adjustable by HOLDITME value). - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.

34 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-4 -> ROUTER-5 -> HOST-2. -

35 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-5 -> ROUTER-4 -> HOST-1. -

At both directions, route of AS1000 becomes via ROUTER-1

36 Put in the cable (I/F-2y) to HUB. - -

37 Wait 2 minutes (adjustable by HOLDITME value). - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.

38 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2. -

39 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1. -

At both directions, change route of AS1000 (preparation after action 46)

40 At ROUTER-4,
set "local preference =200" for all routes advertised from ROUTER-5. - -

41 At ROUTER-1,
set "local preference =100" for all routes advertised from ROUTER-2. - -

42 At ROUTER-5,
set "local preference =200" for all routes advertised from ROUTER-4. - -

43 At ROUTER-3,
set "local preference =100" for all routes advertised from ROUTER-2. - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.

At both directions, route of AS1000 becomes via ROUTER-5 (preparation after action 46)

44 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-4 -> ROUTER-5 -> HOST-2. -

45 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-5 -> ROUTER-4 -> HOST-1. -

At both directions, route of AS1000 becomes via ROUTER-1

46 Pull off the cable of ROUTER-4 from HUB (I/F-4v). - -

47 Wait 4 minutes (adjustable by HOLDITME value). - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.

48 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-2. -

49 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute.
*ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1. -

At both directions, route of AS1000 becomes via ROUTER-5

50 Put in the cable of ROUTER-4 (I/F-4v) in HUB. - -

51 Wait 2 minutes (adjustable by HOLDITME value). - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.

52 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute.
*ROUTER-4 -> ROUTER-5 -> HOST-2. -

53 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-5 -> ROUTER-4 -> HOST-1. -

Mark"*"with no number means that we are going to judge that subject.

Machine	Comments	Initial status	Configuration
HOST-2	Reference Machine	is attached to Net-w with power turned off.	-
ROUTER-3	Reference Machine	Power is turned off. I/F-3x is attached to Net-x while I/F-3w is attached to Net-w.	AS number is 3000. BGP ID is 10.21.1.203. IBGP peer is ROUTER-5. EBGP peer is AS 2000. Sends route of link attached to interface I/F-3w. Doesn't send routing information that ROUTER-5 advertised to AS 2000. Sends RA to Net-w and Net-x.
ROUTER-5	Reference Machine	Power is turned off. I/F-5w is attached to Net-w while I/F-5v is attached to Net-v.	AS number is 3000. BGP ID is 10.21.1.203. IBGP peer is ROUTER-3. EBGP peer is AS 1000. Sends route of link attached to interface I/F-5w. Doesn't send routing information that ROUTER-3 advertised to AS 1000. Sends RA to Net-v and Net-w.
ROUTER-2	Reference Machine	Power is turned off. I/F-2y is attached to Net-y while I/F-2x is attached to Net-x.	AS number is 2000. EBGP peer is AS 1000 and 3000. Sends routing information that AS 1000 and 3000 advertised to AS 3000 and 1000. Sends RA to Net-x and Net-y. Doesn't send and receive RIPng.
ROUTER-1	Target Machine	Power is turned off. I/F-1z is attached to Net-z while I/F-1y is attached to Net-y.	AS number is 1000. BGP ID is 10.21.1.201. EBGP peer is AS 2000. IBGP peer is ROUTER-4. Sends route of link attached to interface I/F-1z. Doesn't send routing information that ROUTER-4 advertised to AS 2000. Sends RA to Net-y and Net-z.
ROUTER-4	Reference Machine	Power is turned off. I/F-4z is attached to Net-z while I/F-4v is attached to Net-v.	AS number is 1000. BGP ID is 10.21.1.204. IBGP peer is ROUTER-1. EBGP peer is AS 3000. Sends route of link is attached to interface I/F-4z. Doesn't send routing information that ROUTER-1 advertised to AS 3000. Sends RA to Net-v and Net-z.
HOST-1	Reference Machine	is attached to Net-z with power turned off.	-

No	Action	Criteria	Comments
1	Boot HOST-1.	-	-
2	Boot HOST-2.	-	-
3	Boot ROUTER-1.	-	-
4	Boot ROUTER-2.	-	-
5	Boot ROUTER-3.	-	Check the routing table of Router-1. Now ROUTER-1, 2 and 3 learn the path between Net-z and Net-w.
Reachability Check
6	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2.	-
7	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1.	-
Make shorter route
8	Boot ROUTER-4.	-	-
9	Boot ROUTER-5.	-	All routers learn the shortest path between Net-z and Net-w. Check the BGP4+ information and routing information of every router.
Selection shorter route at both direction
10	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-4 -> ROUTER-5 -> HOST-2.	-
11	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-5 -> ROUTER-4 -> HOST-1.	-
AS3000 controls incoming route using "PREPEND"
12	At ROUTER-5, prepend its AS number twice to the AS path advertising to ROUTER-4 (prepend 2).	-	Check the BGP4+ information and routing information of every router. Check AS path and next hop address.
13	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2.	-
14	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-5 -> ROUTER-4 -> HOST-1.	-
15	At ROUTER-3, prepend its AS number twice to the AS path advertising to ROUTER-2 (prepend 2).	-	Check the BGP4+ information and routing information of every router. Check AS path and next hop address.
16	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-4 -> ROUTER-5 -> HOST-2.	-
17	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-5 -> ROUTER-4 -> HOST-1.	-
AS1000 controls outbound route using "LOCAL PREFERENCE"
18	At ROUTER-4, set "local preference =100" for all routes advertised from ROUTER-5.	-	-
19	At ROUTER-1, set "local preference =200" for all routes advertised from ROUTER-2.	-	Check the BGP4+ information and routing information of every router. Check AS path and next hop address.
20	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2.	-
21	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-5 -> ROUTER-4 -> HOST-1.	-
AS1000 controls inbound route using "PREPEND"
22	At ROUTER-4, prepend its AS number twice to the AS path advertising to ROUTER-5 (prepend 2).	-	Check the BGP4+ information and routing information of every router. Check AS path and next hop address.
23	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2.	-
24	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-2.	-
25	At ROUTER-1, prepend its AS number twice to the AS path advertising to ROUTER-2 (prepend 2).	-	-
26	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2.	-
27	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-5 -> ROUTER-4 -> HOST-1.	-
At both directions, change route of AS1000 (preparation after action 32)
28	At ROUTER-5 configure the value of local preference with 100 for all route advertised from ROUTER-4.	-	-
29	At ROUTER-3 configure the value of local preference with 200 for all route advertised from ROUTER-2.	-	Check the BGP4+ information and routing information of every router. Check AS path and next hop address.
At both directions, route of AS1000 becomes via ROUTER-1 (preparation after action 32)
30	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2.	-
31	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1.	-
At both directions, route of AS1000 becomes via ROUTER-5
32	Pull off the cable (I/F-2y) from HUB.	-	-
33	Wait 4 minutes (adjustable by HOLDITME value).	-	Check the BGP4+ information and routing information of every router. Check AS path and next hop address.
34	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-4 -> ROUTER-5 -> HOST-2.	-
35	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-5 -> ROUTER-4 -> HOST-1.	-
At both directions, route of AS1000 becomes via ROUTER-1
36	Put in the cable (I/F-2y) to HUB.	-	-
37	Wait 2 minutes (adjustable by HOLDITME value).	-	Check the BGP4+ information and routing information of every router. Check AS path and next hop address.
38	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2.	-
39	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1.	-
At both directions, change route of AS1000 (preparation after action 46)
40	At ROUTER-4, set "local preference =200" for all routes advertised from ROUTER-5.	-	-
41	At ROUTER-1, set "local preference =100" for all routes advertised from ROUTER-2.	-	-
42	At ROUTER-5, set "local preference =200" for all routes advertised from ROUTER-4.	-	-
43	At ROUTER-3, set "local preference =100" for all routes advertised from ROUTER-2.	-	Check the BGP4+ information and routing information of every router. Check AS path and next hop address.
At both directions, route of AS1000 becomes via ROUTER-5 (preparation after action 46)
44	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-4 -> ROUTER-5 -> HOST-2.	-
45	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-5 -> ROUTER-4 -> HOST-1.	-
At both directions, route of AS1000 becomes via ROUTER-1
46	Pull off the cable of ROUTER-4 from HUB (I/F-4v).	-	-
47	Wait 4 minutes (adjustable by HOLDITME value).	-	Check the BGP4+ information and routing information of every router. Check AS path and next hop address.
48	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-2.	-
49	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute. ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1.	-
At both directions, route of AS1000 becomes via ROUTER-5
50	Put in the cable of ROUTER-4 (I/F-4v) in HUB.	-	-
51	Wait 2 minutes (adjustable by HOLDITME value).	-	Check the BGP4+ information and routing information of every router. Check AS path and next hop address.
52	At HOST-1, run "traceroute" to HOST-2's global address.	Complete traceroute. ROUTER-4 -> ROUTER-5 -> HOST-2.	-
53	At HOST-2, run "traceroute" to HOST-1's global address.	Complete traceroute ROUTER-5 -> ROUTER-4 -> HOST-1.	-