Bandwidth

1
??????????? ?????????????? ???????? ?? ????? ????

• Bandwidth
• Priority
• Administrative Weight
• Attributes Affinity

2
Bandwidth

• ip rsvp bandwidth ltxgt ltygt
• ????????? ????????? RSVP ???????????
  ????????????? ?? X ????/c ?????????? ???????????
  ?? ???????????? ??????????
• X ??????? ?????? ?????????????? ? ????/?
• Y ? MPLS ?? ????????????
• default XY75 ????????? ???????????
  ??????????

3
Priority

• tunnel mpls traffic-eng ltSgt H
• ??????????????? ?? ?????????? ???? tunnel
• S setup priority (0-7) - ?????????
• H holding priority (0-7) - ?????????
• 0 ?????? ?????????

4
Priority

• ????? ??????? ? ????? ??????? ???????????
  ????????? ????? ????????? (?????????) ??????? ?
  ????? ?????? ??????????? ?????????, ???? ???
  ????? ?????????? ??????????? ??????? ???????
• ???????????????? SltH ?? ???????????
• Default S7, H7

5
Priority
40MB tunnel S7, H7
40MB tunnel S6, H6
45MB
45MB
45MB
6
Priority
40MB tunnel with S7, H7
40MB tunnel with S6, H6
45MB
45MB
45MB

• RtrC ???????? ????????? ResvTear ????????? RSVP
  ? RtrA, ??????? ???????????

7
Administrative Weight

• mpls traffic-eng administrative-weight ltXgt
• ??????? ???????????????? ??????????? ??????????
• X 0, 1, (232 1)
• ????????? ???????, ??????? ???????? ??????? IGP

8
Administrative Weight

• tunnel mpls traffic-eng path-selection metric
  teigp
• ??????? ???????????????? ???????
• Default ???????? - igp
• ???????? te ???????? ? ?????????????
  ?????????????????? ???????????????? ???????
  administrative-weight ??? ?????? ???? ??? ???????
• ?????? ???????????? ??? ????? ???????? ???????
  ?????????????? ? ????????? ???????

9
?????????????? ? ????????? ???????

• tunnel mpls traffic-eng path-selection metric
  teigp
• mpls traffic-eng administrative-weight ltxgt
• ??????????????? admin weight interface delay
• ??????????????? VoIP ??????? ??? ?????????????
  ??????? TE metric ??? ?????? ????

10
Attributes Affinity

• ???????? 32 ????, ??????????? ?????????
  ???????? ?????? ?????
• Affinity ??????? (????????) ??????? ?????????
  ??????? ????? ?????? ? ????????????? ??????????

11
Attributes Affinity

• mpls traffic-eng attribute-flags lt0x0-0xFFFFFFFFgt
• ??????? ??????????? ??????????

12
Attributes Affinity

• tunnel mpls traffic-eng affinity lt0x0-0xFFFFFFFFgt
  mask lt0x0-0xFFFFFFFFgt
• ??????? ???????????????? ???????
• ????? ?????????? ???? ????????
• ???? affinity ?????????? ???????? ???????? ???
  ????????
• 0x2 mask 0xA - ???? ?????????? ???? 2 and 8
  ??? 2 ?????? ???? ?????????? ? 1, ? ??? 8 - ? 0

13
Attributes Affinity

• ?????? ????? ????????? ??????????? ?????? ??
  ??????? ??? VoIP, ????? ???? ???? ??????? ???????
  0x2, ? ??????? ??? VoIP ???????????????? ???
  affinity 0x0 mask 0x2

14
Auto-Bandwidth ???????????? ?????????
?????????????? ??????

• tunnel mpls traffic-eng auto-bw ?
• collect-bw Just collect Bandwidth info on this
  tunnel
• frequency Frequency to change tunnel BW
• max-bw Set the Maximum Bandwidth for
  auto-bw on this tunnel
• min-bw Set the Minimum Bandwidth for
  auto-bw on this tunnel
• ??????? ???????????????? ???????
• ???????????? ???????? ????????????????? ??????
  ??? ??????? ? ?????????? ?? ???????,
  ????????????? ????? ???????
• ????????????? ?????? ???????

15
?????? ????? ? ???????

• ? ??????? IP ???? ????? ?????? ???????? ? ???????
  ? ????????? ??????

???? ?? ???? ??????? ??? ????????????????? ?????
??????????? ?????? ?????? ??????? ?? ????????? ??? (POS APS)
??????????????? ?????????? ???????? IGP ??????? 5-30 ???
?????????? ?????? ???? ??????????? ?????????????? ????, CPU 1-2???
16
?????? ????? ? ???????

• ? ???? MPLS ????? ????????? ????????? ??????
  ???????? ??? ???????? ?? ????? ???? LSP

???? ?? ???? ??????? ??? ????????????????? ?????
??????????? ?????? ?????? ??????? ?? ????????? ??? (POS APS)
??????????????? ?????????? ???????? IGP ??????? 5-30 ???
?????????? ?????? ???? ??????????? ?????????????? ????, CPU 1-2 ???
????????? ?????? ???? LSP ?????? ???? 1-5 ???
17
??????????? ?????? ???? ? MPLS
tunnel mpls traffic-eng path-option 1 explicit
name straight tunnel mpls traffic-eng
path-option 2 dynamic
???????? ??? ????? ??? ??????? ???????? ??????
??????????? ???? ????????? ???????????
??????????? ???? ????? ?????? ????????
18
Fast ReRouting (Cisco) ??????? ??????? ?? ?????
????

• Link Protection
• ???????????? ?????, ????????????? ???????
• Node Protection
• ???????????????
• Path Protection
• ??????? ???? ?????????????

19
Link Protection

• TE ??????? A-gtB-gtD-gtE

20
Link Protection

• B ????? ?????????????? ????????????? ??????? ?
  ???????? ????? ?????????? ????? (RtrD)
• B ???????, ??? D ??????????? ??? ????????????
  ????? ?????????? (????????????-?????????????)
  ???????????? ?????

21
Link Protection

• ????? B-gtD ??????????, ??????? A-gtE
  ??????????????? ? ??????? B-gtD
• ????????? ??????? ???????????? ?? ??? ???, ???? A
  ?? ???????? ????? ???? ??? ??????? A-gtB-gtC-gtD-gtE
  ( 10-30 ???)

22
Link Protection

• ???????????????? ??????? ? ingress LSP
• tunnel mpls traffic-eng fast-reroute

• ?? ?????????? ?????
• mpls traffic-eng backup-path ltbackup-tunnelgt

23
??? ??????? ? ????????? QoS ? ????? MPLS

• DS-TE Diffserv-aware Traffic Engineering (L-LSP)
• ????????? ???? (? ??????????????) ??? ???????
  ??????? ?????? ??????? DiggServ
• ????? ?????????? ??????????, ???????????? ???
  MPLS TE
• ????????? ? ?????????? ????????????
  (??????????????) ??????? ????? ?????????? QoS
  ??? ???????? ??????
• ?? ???? ???????????????? QoS
• MPLS DS (E-LSP)
• DSCP -gt EXP
• EXP -gt PHB ??????????????? ???????

24
?????????????? ?????? ? TE
Find route set-up tunnel for 20 Mb/s from POP1
to POP4
Find route set-up tunnel for 10 Mb/s from POP2
to POP4
WAN area
25
?????? ???????? ? ????????? ???????? ? MPLS TE

• 2 ??????? ????? ????? Clt-gtE
• 40MB ?????? ???????
• 100MB ????????? ?????? ?? ????? Clt-gtE, 55 ?? ???
  ????????? ????????? ??????
• ??? ?????, ???? ?????? ??????? ????? ??????????
  ?? 20MB ???????VoIP?

26
?????? ???????? ? ????????? ???????? ? MPLS TE
55MB LLQ40MB LLQ 95 MB LLQ ?? 25?? ??????
50 ?????? ??????? ???????? ??????

• ???????? ???? ??? ?????????? ??????????? ???
  ??????????, ??? ??????????? ???????????????? ???
  ???????!
• ??????? ???????????? ????????? ?????

27
???????? ??? ??????? ???????????? ?????????????
Delay
???? ??? Best-Effort
???? ??? Data Premium AF1
???? ??? EF
Utilization
?
100
?
0
???? ??? EF ??????? lt ? , ?? ???????? EF ?????
?????? M1 ms ???? ??? AF1 ??????? lt ? , ??
???????? AF1 ????? ?????? M2 ms
28
Diffserv-Aware Traffic Engineering

• ip rsvp bandwidth ltxgt sub-pool ltygt
• ??? ????? ????? ????????????? ?????? X, Y ??
  ??????? ??? sub-pool
• ??? ????????????? ??????? ???????? ?????? Y
  ????/c, ??????? ????? ?????? ? ??? X

29
???? ?????????? ???????????
????? ???????? ???? TE
??? ??? ????????????? ???????, ???? ??
???????????????, ?? ?????? ???????? ?????? ????
30
Diffserv-Aware Traffic Engineering

• tunnel mpls traffic-eng bandwidth ltxgt sub-pool
• ???????? ??????? ??? ????????????? ???????,
  ??????? ??????????? X ????/? ?? sub-pool
• ???? ? sub-pool ??? ??? ??????????? ??????, ??
  ??????? ?? ???????????????
• ?????? ? ???? ?????? ???????????? ? ????????????
  ???????

31
?????????????? DS-TE

• ?????? ???????? 2000
• Internet Drafts
• draft-ietf-tewg-diff-te-reqts-00.txt
• draft-ietf-mpls-diff-te-ext-01.txt
• draft-ietf-ospf-diff-te-00.txt
• draft-ietf-isis-diff-te-00.txt

32
???? TE - Best Effort
Find route set-up tunnel for 20 Mb/s from POP1
to POP4
Find route set-up tunnel for 10 Mb/s from POP2
to POP4
WAN area
33
???? TE ? MPLS Diff-Serv
Find route set-up tunnel for 20 Mb/s
(aggregate) from POP1 to POP4
Find route set-up tunnel for 10 Mb/s
(aggregate) from POP2 to POP4
WAN area
34
DiffServ Aware Traffic Engineering
Find route set-up tunnel for 5 Mb/s of EF from
POP1 to POP4
Find route set-up tunnel for 3 Mb/s of EF from
POP2 to POP4
35
?????????? ?????????? ?? ?????? GMPLS

• ??????? ??????????
• ????-????? ? ??????????? ?????????? SDH/PDH
• ???????? ????? (??????) DWDM
• ?????????? ??????? (?????)

????? GMPLS ???????????? ????? ???????? ?????
???????, ????? ????? ??? ????-????? ? ???????????
?????????? ???????? ???????????? ?? ???????????
GMPLS ????????? ??????????? ????????????
?????????? ???? ????? SDH-?????????????? ? DWDM
?????-?????????? ???????? ?? ?????????? ????????
?? ?????? ????????? ???? ? ????????? ??????? ??
???????????? ?????????? ????????????? ????? IP
OSPF ? IS-IS ? ???????????? ??????? ?? ???????
???????????? ????????? ??????? ???????
???????????, ??? ? SDH
36
???????? ??????? ?????????? ? GPMLS
IP-??????
????-????? ? ??????????? ??????????
?????
???????
l
l
Fiber
IP
SDH
SDH
IP
???????????? GMPLS ????????? ???????????? ????? ?
??????????? ???????????? ????? ?????????
??????????

• ???? ???????????? ???? ? ?????
• ???? IP-??????? ???????????? ? SDH/PDH ????
• SDH/PDH ???? ???????????? ? ???? ?????????? ????
• ???? ?????????? ????? ???????????? ? ???????

37
?????????????? GMPLS

• ????????? ?????? ?????????? ?????????? Internet
  Draft
• ? ?????????? ????????? ?????? ???????
  ????????????? ?????????????? ???????????
  ???????????? Nortel, Alcatel, Lucent, Siemens,
  Cisco, Juniper, CIENA ? ?????? ??????
• ????? Optical Internetworking Forum ??????????
  ?????? ???????????? ????????????????? ??????????
  ??????? ? ??????????? ???? Optical UNI
• ????????????? ????????? ???????????? ??
  ?????????? Optical UNI ???? ?????????????????? ?
  ???? ???????????-??? SuperComm-2001. ?
  ???????????? ?????????????? ???????????? 25
  ??????????????, ? ??? ????? Nortel, Lucent,
  Cisco, Alcatel, CIENA, Sycamore