15744: Computer Networking. L8 Routers. Forwarding and Routers. Forwarding IP lookup Highspeed router architecture Readings [McK97] A Fast Switched Backplane for a Gigabit Switched Router [KCY03] Scaling Internet Routers Using Optics Know RIP/OSPF Optional
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
L8 Routers
Approximate power consumption per rack
Power density is the limiting factor today
Switch
Thermal Image of Typical ClusterM. K. Patterson, A. Pratt, P. Kumar, “From UPS to Silicon: an endtoend evaluation of datacenter efficiency”, Intel Corporation
Switch
Linecards
Multirack RoutersReduce Power DensityOut
Out
Out
Out
100% throughput for weakly mixing, stochastic traffic
[C.S. Chang, Valiant]
Twostage LoadBalancing SwitchR
R
R
R/N
R/N
In
Out
R/N
R/N
R/N
R/N
R/N
R/N
R
R
R
In
R/N
R/N
R/N
R/N
R/N
R/N
R
R
R
R/N
R/N
In
R/N
R/N
Loadbalancing stage
Switching stage
A, B, C, D
B, B, B, B
A, B, C, D
C, C, C, C
A, B, C, D
D, D, D, D
A, B, C, D
4 WDM channels,
each at rate 2R/N
In
In
In
In
Out
Out
Out
Out
Static WDM SwitchingArray
Waveguide
Router
(AWGR)
Passive andAlmost ZeroPower
A
B
C
D
2
2
2
2
2
l1
R
l1, l2,.., lN
WDM
lN
R
l1
l1, l2,.., lN
R
R
WDM
2
lN
Out
l1
R
l1, l2,.., lN
R
1
1
1
1
WDM
lN
Linecard DataflowIn
l1
l1, l2,.., lN
R
R
WDM
lN
1
3
1
1
1
1
2
3
4
1
1
1
1
Provider is given 201.10.0.0/21
Provider
201.10.0.0/22
201.10.4.0/24
201.10.5.0/24
201.10.6.0/23
201.10.0.0/21
Provider 1
Provider 2
201.10.0.0/22
201.10.4.0/24
201.10.5.0/24
201.10.6.0/23 or Provider 2 address
Trie
Sample Database
Root
0
1
P5
P4
0
1
P1
0
1
0
0
P2
0
P6
0
1
0
P3
P7
0
P8
Prefixes P1 = 1*, P2 = 10*, P3 = 101*
>
=
0000


1000
P2
P2
1010
P3
P3
P1
P3
1011
P3
P1
P2
1111

P1