Last Update : February 26, 2000
This scenario verifies interoperability when the target ROUTER is attached to the model network.
Verification that router treats the BGP4+ non transit multi AS single router.
Verification Points:
Router sends packets via shortest route, calculated from AS path, for the destination address.
HOST-2 (Net-w) (Prefix 3ffe:501:481d:f006::/64) | AS 3000 / -+-------+------------+---- / AS3000 / | | / / (I/F-3w)| |(I/F-4w) / ////// ROUTER-3 /////////// ROUTER-4 ///// (I/F-3x)| |(I/F-4v) | | (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-1v) /////////// ROUTER-1 ///////////// AS1000 / |(I/F-1z) / / | / (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
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-4.
EBGP peer is AS 2000.
Sends route of link attached to interface I/F-3w.
Doesn't send routing information that ROUTER-4 advertised to AS 2000.
Sends RA to Net-w and Net-x.ROUTER-4 Reference Machine Power is turned off. I/F-4w is attached to Net-w while I/F-4v is attached to Net-v. AS number is 3000.
BGP ID is 10.21.1.204.
IBGP peer is ROUTER-3.
EBGP peer is AS 1000.
Sends route of link attached to interface I/F-4w.
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 and I/F-1v is attached to Net-v. AS number is 1000.
EBGP peer is AS 2000 and 3000.
Sends route of link attached to interface I/F-1z.
Doesn't send routing information that AS 2000 advertised to AS 3000.
Doesn't send routing information that AS 3000 advertised to AS 2000.
Sends RA to Net-v, Net-y and Net-z.
Doesn't send and receive RIPng.HOST-1 Reference Machine Is attached to Net-z with power turned off. -
UDP, ICMP
traceroute program (traceroute)
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. - All routers learn the shortest path between Net-z and Net-w.
Check the BGP4+ information and routing information of every router.Select shorter route at both direction. 9 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-4 -> HOST-2- 10 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-4 -> ROUTER-1 -> HOST-1- AS3000 controls incoming route using "PREPEND". 11 At ROUTER-4, prepend its AS number twice to the AS path advertising to ROUTER-1
(prepend 2).- Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.12 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2- 13 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-4 -> ROUTER-1 -> HOST-1- 14 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.15 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-4 -> HOST-2- 16 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-4 -> ROUTER-1 -> HOST-1- AS1000 controls outbound route using "LOCAL PREFERENCE". 17 At ROUTER-1,
set "local preference =100" for all routes advertised from ROUTER-4.- - 18 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.19 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2- 20 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-4 -> ROUTER-1 -> HOST-1- AS1000 controls inbound route using "PREPEND". 21 At ROUTER-1, 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.22 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2- 23 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-3 -> ROUTER-2 -> ROUTER-1 -> HOST-1- 24 At ROUTER-1, 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.25 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2- 26 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-4 -> ROUTER-1 -> HOST-1- At both directions, change route of AS1000 (preparation after action 31). 27 At ROUTER-4, configure the value of local preference with 100 for all route advertised from ROUTER-1. - - 28 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 31). 29 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2- 30 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-4. 31 Pull off the cable(I/F-2y) from HUB. - - 32 Wait 4 minutes (adjustable by HOLDITME value). - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.33 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-4 -> HOST-2- 34 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-4 -> ROUTER-1 -> HOST-1- At both directions, route of AS1000 becomes via ROUTER-1. 35 Put in the cable(I/F-2y) to HUB. - - 36 Wait 2 minutes (adjustable by HOLDITME value). - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.37 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2- 38 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 45). 39 At ROUTER-1,
set "local preference =200" for all routes advertised from ROUTER-4.- - 40 At ROUTER-1,
set "local preference =100" for all routes advertised from ROUTER-2.- - 41 At ROUTER-4,
set "local preference =200" for all routes advertised from ROUTER-1.- - 42 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 45). 43 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-4 -> HOST-2- 44 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-4 -> ROUTER-1 -> HOST-1- At both directions, route of AS1000 becomes via ROUTER-1. 45 Pull off the cable of ROUTER-4 from HUB (I/F-4v). - - 46 Wait 4 minutes (adjustable by HOLDITME value). - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.47 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-1 -> ROUTER-2 -> ROUTER-3 -> HOST-2- 48 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. 49 Put in the cable of ROUTER-4 (I/F-4v) in HUB. - - 50 Wait 2 minutes (adjustable by HOLDITME value). - Check the BGP4+ information and routing information of every router.
Check AS path and next hop address.51 At HOST-1, run "traceroute" to HOST-2's global address. *Complete traceroute
*ROUTER-4 -> ROUTER-1 -> HOST-2- 52 At HOST-2, run "traceroute" to HOST-1's global address. *Complete traceroute
*ROUTER-4 -> ROUTER-1 -> HOST-1-
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