Command syntax design

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# Create BGP session

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Set bgp_agent1 [new Agent/rtProto/BGP]

$ns_ attach-agent $n1 $bgp_agent1

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# configure parameters for whole session

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$bgp_agent1 set connretry_time 120

$bgp_agent1 set min_as_orig_time 15

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# configure parameters for each peer

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$bgp_agent1 neighbor $n2 remote_as 2

$bgp_agent1 neighbor $n2 hold_time 90

$bgp_agent1 neighbor $n2 keep_alive_time 30

$bgp_agent1 neighbor $n2 mrai 30

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# create route maps

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set IN_MAP1 [new rtMap]

set OUT_MAP1 [new rtMap]

$bgp_agent1 neighbour $n2 route_map OUT_MAP1 out

$bgp_agent1 neighbour $n2 route_map IN_MAP1 in

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# create address-list and as-path-list

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set ADR_LIST1 [new addrList]

set AS_PATH1 [new AsPathList]

$ADR_LIST1 permit $n2

$AS_LIST1 permit ^1 6$

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# configure route map

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$OUT_MAP1 permit 10

$OUT_MAP1 match address ADR_LIST1

$OUT_MAP1 set local-preference 150

$OUT_MAP1 permit 20

$OUT_MAP1 match as-Path AS_PATH1

$OUT_MAP1 set local-preference 80

$IN_MAP1 deny 10

$IN_MAP1 set metric 250

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# return handle of particular peer entry

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set peer1 [$bgp_agent1 neighbour? $n2]

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# manipulate route attributes

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set rte [new bgpRoute]

$rte set nlri_ $n1

$rte set origin_ Origin/IGP

$rte prepend_as 2

$rte set next_hop_ $n1

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# Send a update message to n2

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set updateMsg [new Msg/UpdateMsg]

$updateMsg set route_ rte

$bgp_agent1 send updateMsg peer1

$bgp_agent1 reset_timer peer1 Timer/KEEPALIVE

$bgp_agent1 reset_timer peer1 Timer/HOLD

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