MPLS Traffic Engineering automatic LSP
В отличии от других протоколов, в MPLS не заложено автообнаружение MPLS-маршрутизаторов. Построение LSP лежит целиком на Операторе. Ели, например, вы добавляете BGP-маршрутизатор в сеть, то достаточно создать BGP-сессии с RR. В RSVP нет аналогов RR, поэтому вы, по идее, должны строить LSP со всеми MPLS-маршрутизаторами - трудоёмкая работа.
Поэтому производители сетевого оборудования, в частности Cisco и Juniper, разработали средства по автоматизации построения LSP.
Cisco IOS configuration example
MPLS TE autotunnel (Primary/Backup) and Automesh
!
mpls traffic-eng tunnelsmpls traffic-eng logging lsp setupsmpls traffic-eng logging lsp teardowns
! mpls traffic-eng auto-tunnel backupmpls traffic-eng auto-tunnel backup config unnumbered-interface Loopback1!
mpls traffic-eng auto-tunnel primary onehopmpls traffic-eng auto-tunnel primary config unnumbered-interface Loopback1mpls traffic-eng auto-tunnel primary timers removal rerouted 900
!Enables LDP on primary autotunnels (required for xconnect)mpls traffic-eng auto-tunnel primary config mpls ipmpls traffic-eng auto-tunnel primary tunnel-num min 1000 max 1999!
mpls traffic-eng auto-tunnel meshmpls traffic-eng auto-tunnel mesh tunnel-num min 20000 max 29999
!
access-list 99 permit XX.219.128.96 0.0.0.31
access-list 99 permit host XX.219.128.2
!
ip rsvp signalling hello
ip rsvp signalling hello bfd
ip rsvp signalling hello statistics
!
access-list 99 permit XX.219.128.96 0.0.0.31
access-list 99 permit host XX.219.128.2
!
ip rsvp signalling hello
ip rsvp signalling hello bfd
ip rsvp signalling hello statistics
!
!interface Auto-Template1ip unnumbered Loopback1no ip redirectsload-interval 30mpls ipmpls traffic-eng tunnelstunnel mode mpls traffic-engtunnel destination access-list 99tunnel mpls traffic-eng autoroute announcetunnel mpls traffic-eng priority 7 6tunnel mpls traffic-eng bandwidth 50000tunnel mpls traffic-eng path-option 1 dynamictunnel mpls traffic-eng record-routetunnel mpls traffic-eng fast-reroutetunnel mpls traffic-eng auto-bw max-bw 5000000 min-bw 1000!
router ospf 1
mpls traffic-eng mesh-group 1 loopback 1 area 0
end
!
mpls traffic-eng mesh-group 1 loopback 1 area 0
end
!
debug
debug mpls traffic-eng auto-tunnel mesh
debug mpls traffic-eng tunnels signalling
debug mpls traffic-eng tunnels errors
show mpls traffic-eng tunnels brief
show mpls traffic-eng auto-tunnel mesh
show mpls traffic-eng tunnels property auto-tunnel mesh brief
sh mpls traffic-eng tunnels protection
sh mpls traffic-eng tunnels backup
sh mpls traffic-eng fast-reroute database role middle detail
show ip rsvp fast-reroute
debug mpls traffic-eng tunnels signalling
debug mpls traffic-eng tunnels errors
show mpls traffic-eng tunnels brief
show mpls traffic-eng auto-tunnel mesh
show mpls traffic-eng tunnels property auto-tunnel mesh brief
sh mpls traffic-eng tunnels protection
sh mpls traffic-eng tunnels backup
sh mpls traffic-eng fast-reroute database role middle detail
show ip rsvp fast-reroute
JunOS configuration example
configure
set groups rsvp_interfaces protocols rsvp interface <*> aggregate
set groups rsvp_interfaces protocols rsvp interface <*> subscription 95
set groups rsvp_interfaces protocols rsvp interface <*> link-protection
# common config for static LSPs
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> ldp-tunneling
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> bandwidth 500m
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> record
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> adaptive
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> fast-reroute bandwidth 0
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> auto-bandwidth adjust-interval 3600
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> auto-bandwidth adjust-threshold 5
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> auto-bandwidth minimum-bandwidth 500m
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> auto-bandwidth maximum-bandwidth 2g
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> auto-bandwidth adjust-threshold-overflow-limit 3
set protocols ospf traffic-engineering shortcuts ignore-lsp-metrics
set protocols rsvp apply-groups rsvp_interfaces
set protocols rsvp load-balance bandwidth
set groups rsvp_interfaces protocols rsvp interface <*> aggregate
set groups rsvp_interfaces protocols rsvp interface <*> subscription 95
set groups rsvp_interfaces protocols rsvp interface <*> link-protection
# common config for static LSPs
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> ldp-tunneling
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> bandwidth 500m
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> record
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> adaptive
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> fast-reroute bandwidth 0
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> auto-bandwidth adjust-interval 3600
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> auto-bandwidth adjust-threshold 5
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> auto-bandwidth minimum-bandwidth 500m
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> auto-bandwidth maximum-bandwidth 2g
set groups p2p-mpls-lsp-settings protocols mpls label-switched-path <p2p-*> auto-bandwidth adjust-threshold-overflow-limit 3
set protocols ospf traffic-engineering shortcuts ignore-lsp-metrics
set protocols rsvp apply-groups rsvp_interfaces
set protocols rsvp load-balance bandwidth
# http://networkengineering.stackexchange.com/questions/19367/why-are-my-equal-cost-lsps-not-load-balancing-equally-when-using-auto-bandwidth
deactivate protocols rsvp load-balance
set protocols rsvp traceoptions file rsvp.log
set protocols rsvp traceoptions file size 10000000
set protocols rsvp traceoptions file files 3
set protocols rsvp traceoptions file world-readable
set protocols rsvp traceoptions flag error detail
deactivate protocols rsvp load-balance
set protocols rsvp traceoptions file rsvp.log
set protocols rsvp traceoptions file size 10000000
set protocols rsvp traceoptions file files 3
set protocols rsvp traceoptions file world-readable
set protocols rsvp traceoptions flag error detail
set protocols rsvp interface lo0.0
# common config for static LSPs
set protocols mpls apply-groups p2p-mpls-lsp-settings
# common config for static LSPs
set protocols mpls apply-groups p2p-mpls-lsp-settings
set protocols mpls path-mtu rsvp mtu-signaling
set protocols mpls statistics file mpls-auto-statistics.log
set protocols mpls statistics file size 3m
set protocols mpls statistics file files 3
set protocols mpls statistics interval 900
set protocols mpls statistics auto-bandwidth
set protocols mpls statistics file size 3m
set protocols mpls statistics file files 3
set protocols mpls statistics interval 900
set protocols mpls statistics auto-bandwidth
set protocols mpls log-updown syslog
set protocols mpls log-updown trap
set protocols mpls log-updown trap-path-down
set protocols mpls log-updown trap-path-up
set protocols mpls log-updown trap
set protocols mpls log-updown trap-path-down
set protocols mpls log-updown trap-path-up
set protocols mpls traffic-engineering mpls-forwarding
set protocols mpls traceoptions file mpls.log
set protocols mpls traceoptions file size 1000000
set protocols mpls traceoptions file files 3
set protocols mpls traceoptions file world-readable
set protocols mpls traceoptions flag error
set protocols mpls traceoptions file size 1000000
set protocols mpls traceoptions file files 3
set protocols mpls traceoptions file world-readable
set protocols mpls traceoptions flag error
set protocols mpls no-propagate-ttl
set protocols mpls optimize-timer 900
set protocols mpls label-switched-path rsvp-te-template template
set protocols mpls label-switched-path rsvp-te-template ldp-tunneling
set protocols mpls label-switched-path rsvp-te-template bandwidth 250m
set protocols mpls label-switched-path rsvp-te-template record
set protocols mpls label-switched-path rsvp-te-template adaptive
set protocols mpls label-switched-path rsvp-te-template fast-reroute bandwidth 0
set protocols mpls label-switched-path rsvp-te-template auto-bandwidth adjust-interval 3600
set protocols mpls label-switched-path rsvp-te-template auto-bandwidth adjust-threshold 5
set protocols mpls label-switched-path rsvp-te-template auto-bandwidth minimum-bandwidth 250m
set protocols mpls label-switched-path rsvp-te-template auto-bandwidth maximum-bandwidth 1g
set protocols mpls label-switched-path rsvp-te-template auto-bandwidth adjust-threshold-overflow-limit 3
set routing-options dynamic-tunnels auto-tunnel rsvp-te auto-template1 label-switched-path-template rsvp-te-template
set routing-options dynamic-tunnels auto-tunnel rsvp-te auto-template1 destination-networks XX.219.128.96/27
set routing-options dynamic-tunnels auto-tunnel rsvp-te auto-template1 destination-networks XX.219.128.2/32
set routing-options dynamic-tunnels auto-tunnel rsvp-te auto-template1 destination-networks XX.219.128.96/27
set routing-options dynamic-tunnels auto-tunnel rsvp-te auto-template1 destination-networks XX.219.128.2/32
debug
show dynamic-tunnels database
show mpls lsp
show mpls lsp statistics transit
show mpls lsp
show mpls lsp statistics transit
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