Last Update : November 22, 1999
This scenario verifies interoperability when the target ROUTER is attached to the model network.
Verification that a router treat the BGP4+.
Verification Points:
- Router sends packets via shortest route, which is calculated from AS path, for the
destination address.
icmp
HOST-2
(Net-w) (Prefix 3ffe:501:481d:f006::/64) |
AS 3000 ----+--+------
|
(I/F-3w)|
AS3000 =========== ROUTER-3 =======
(I/F-3x)| |(I/F-3v)
| |
(Net-x) (Prefix 3ffe:501:481d:f005::/64)--+---------+- |
| |
|(I/F-2x) |
AS2000 -> ROUTER-2 -+-+-- (Net-v)
|(I/F-2y) |
| |
(Net-y) (Prefix 3ffe:501:481d:f004::/64) -+---------+- |
| |
(I/F-1y)| |(I/F-1v)
AS1000 ========== ROUTER-1 ==========
(I/F-1z)|
|
(Net-z) (Prefix 3ffe:501:481d:f002::/64) ------+---+------
AS 1000 |
HOST-1
(Net-v) (Prefix 3ffe:501:481d:f007::/64)
Machine Comments Initial status Configuration HOST-1 Reference Machine is attached to Net-z with power turned off. - HOST-2 Reference Machine is attached to Net-w with power turned off. - ROUTER-1 Reference 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.
EBGP peer is AS2000 and AS3000.
sends route to AS2000 using EBGP (route: get from Net-z ).
Sends RA to Net-v, Net-y, and Net-z.
Doesn't send and receive RIP.ROUTER-2 Your 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 AS1000 and AS3000.
Sends RA to Net-x and Net-y.
Doesn't send and receive RIP.ROUTER-3 Your 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.
EBGP peer is AS1000 and AS2000.
sends route to AS1000 using EBGP (route: get from Net-w).
Sends RA to Net-y, Net-x, and Net-v.
Doesn't send and receive RIP.
Interoperability is checked using traceroute application program.
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-1,2,3 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-3 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.7 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-1 -> HOST-1Ditto AS3000 controls incoming route using "PREPEND". 8 At ROUTER-3, prepend its AS number twice to the AS path advertising to ROUTER-1
(prepend 2).- - 9 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.10 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-1 -> HOST-1Ditto 11 At ROUTER-3, prepend its AS number twice to the AS path advertising to ROUTER-2
(prepend 2).- - 12 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-3 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.13 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-1 -> HOST-1Ditto 14 At ROUTER-3, remove prepend its AS number from the AS path advertising to ROUTER-2
(remove prepend 2)- - 15 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.16 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-1 -> HOST-1Ditto AS2000 controls incoming route using "PREPEND". 17 At ROUTER-2, prepend its AS number twice to the AS path advertising to ROUTER-1
(prepend 2).- - 18 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-3 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.19 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-1 -> HOST-1Ditto 20 At ROUTER-2, remove prepend its AS number from the AS path advertising to ROUTER-1
(remove prepend 2).- - 21 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.22 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-1 -> HOST-1Ditto At both directions, change route of AS1000 (preparation after action 31). 23 At ROUTER-3, configure the value of local preference with 100 for all route advertised from ROUTER-1. - Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.24 At ROUTER-3, configure the value of local preference with 200 for all route advertised from ROUTER-2. - Ditto At both directions, route of AS1000 becomes via ROUTER-2 (preparation after action 32). 25 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.26 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1Ditto At both directions, route of AS1000 becomes via ROUTER-1 (I/F-1v). 27 Pull off the ROUTER-2's (I/F-2y) cable from HUB. - - 28 Wait 4 minutes (adjustable by HOLDITME value). - - 29 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-3 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.30 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-1 -> HOST-1Ditto At both directions, route of AS1000 becomes via ROUTER-2. 31 Put in the ROUTER-2's (I/F-2y) cable to HUB. - - 32 Wait 2 minutes (adjustable by HOLDITME value). - - 33 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.34 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1Ditto At both directions, change route of AS1000 (preparation after action 45). 35 At ROUTER-1,
set "local preference =200" for all routes advertised from ROUTER-3.- Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.36 At ROUTER-1,
set "local preference =100" for all routes advertised from ROUTER-2.- Ditto 37 At ROUTER-3,
set "local preference =200" for all routes advertised from ROUTER-1.- Ditto 38 At ROUTER-3,
set "local preference =100" for all routes advertised from ROUTER-2.- Ditto At both directions, route of AS1000 becomes via ROUTER-1 (I/F-1v) (preparation after action 45). 39 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.40 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-1 -> HOST-1Ditto At both directions, route of AS1000 becomes via ROUTER-2. 41 Pull out the ROUTER-1's (I/F-1v) cable from HUB. - - 42 Wait 4 minutes (adjustable by HOLDITME value). - - 43 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.44 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1Ditto At both directions, route of AS1000 becomes via ROUTER-1 (I/F-1v). 45 Put the cable of ROUTER-1 (I/F-1v) in HUB. - - 46 Wait 2 minutes (adjustable by HOLDITME value). - - 47 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-3 -> HOST-2Check the BGP information and routing information of every router.
ASPATH, Next-Hop value.48 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-1 -> HOST-1Ditto Mark"*"with no number means that we are going to judge that subject.