Cisco Support Community Presents TechTalk Series Carrier Routing

Cisco Support Community Presents Tech-Talk Series Carrier Routing System (CRS) Multi-Chassis Hitesh Kumar Rahul Rammanohar Vinay Kumar CCIE SP (#38757) CCIE R&S, SP (#13015) CCIE R&S (#35210) HTTS 1

Standalone Chassis CRS-16/S, CRS-16/S-B CRS 1 - 1. 12 Tbps CRS 3 - 4. 48 Tbps CRS-8/S, CRS-8/S-B Back to Back (2+0) Multi-Chassis (X+1, X+2, X+4) X is from 3 to 9 CRS-16/S, CRS-16/S-B CRS 1 - 2. 24 Tbps CRS 3 - 8. 96 Tbps CRS-8/S, CRS-8/S-B CRS 1 - 620 Gbps CRS 3 - 2. 24 Tbps CRS 1 - 1. 12 Tbps CRS 3 - 4. 48 Tbps CRS-4/S CRS 1 - 320 Gbps CRS 3 - 1. 12 Tbps © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 2

Ingress --> 8 (planes) * 4 links * 2. 5 G * 8 b/10 b (encoding) * 120/136 (overhead) = 56 Gbps Egress <-- 8 (planes) * 4 links * 2. 5 G * 8 b/10 b (encoding) * 120/136 (overhead) * 2 S 3 ASICs = 112 Gbps . . . Line Card 0 -7 8 2 . . . 8 of 8 S 3 2 of 8 1 S 2 S 1 4 connections of 2. 5 G to each plane. S 3 S 3 S 2 S 1 S 2 S 3 . . S 1 S 3 S 1 . . . Line Card 8 -15 S 3 8 2 1 S 2 S 1 2 S 3 S 3 . . . Route Processor S 3 S 2 S 1 8 S 3 1 2 connections to each plane to lower S 1 only. © 2010 Cisco and/or its affiliates. All rights reserved. 18 Links Cisco Confidential 3

Ingress --> 8 (planes) * 5 links * 5 G * 8 b/10 b (encoding) * 120/136 (overhead) = 141 Gbps Egress <-- 8 (planes) * 8 links * 5 G * 8 b/10 b (encoding) * 120/136 (overhead) * 2 S 3 ASICs = 225 Gbps 8 Line Card 2 . . . 8 of 8 1 of 8 S 1 1 . . . 5 connections of 5 G to each plane. S 2 2 of 8 S 1 S 2 S 1 . . . 2 1 S 2 . . . 2 S 3 S 2 S 1 8 Route Processor S 3 S 2 8 Line Card S 2 S 3 1 12 Links © 2010 Cisco and/or its affiliates. All rights reserved. 24 Links Cisco Confidential 4

Line Card Chassis Array Cables OIM LED Module Fabric Chassis Ingress. Q S 2 Fabric. Q MSC Card S 13 Fabric Card S 3 S 2 S 1 S 2 Fabric Card S 3 S 2 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 5

Line Card Chassis Back to Back Cables Line Card Chassis Ingress. Q S 1 S 3 Ingress. Q S 2 Fabric. Q S 1 Fabric. Q S 3 S 1 MSC Card S 13 Fabric Card S 2 S 1 S 3 S 13 Fabric Card MSC Card S 3 S 2 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 6

RP 0 Intra-rack LCC 0 RP 1 Inter-rack SC 0 RP 0 Intra-rack LCC 1 RP 1 Inter-rack Forwarding Links Blocked Links © 2010 Cisco and/or its affiliates. All rights reserved. SC 1 FCC 0 Cisco Confidential 7

Single Module Topology Multi-Module Topology • Full Plane Configuration • Three Plane Configuration • Each S 2 SFC serves one plane • Three S 2 SFC’s are used to create a plane • The array cables for each fabric plane are connected to a ONE SFC • Each S 13 card is connected to a single S 2 card The array cables for each fabric plane are connected to all THREE cards • Each S 13 card is connected to 3 different S 2 cards To LC rack # 0 To LC rack # 2 To LC rack # 1 Switch Fabric Card (SFC) © 2010 Cisco and/or its affiliates. All rights reserved. To LC rack # 6 To LC rack # 8 Switch Fabric Cards Cisco Confidential 8

§ Planes are not tied to specific slots in fabric rack § Admin-level config defines the slots for each plane Count 3 - The cables from each LCC for that plane connect to 3 different OIMs. uses (and how big the plane is) controllers fabric plane 0 oim count 1 oim width 1 oim instance 0 location F 0/SM 0/FM Count 1 - All cables in plane connect to the same OIM. controllers fabric plane 1 oim count 3 oim instance 0 location F 0/SM 8/FM oim instance 1 location F 0/SM 7/FM oim instance 2 location F 0/SM 6/FM 3 different cards makes one plane. Plane 1 uses rack F 0 slot SM 6, SM 7 and SM 8. Position of 1 st card within the plane in fabric rack. Plane 0 uses rack F 0 slot SM 0. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 9

Assign a rack number to the S/N of each chassis. Serial numbers can be obtained from, - ‘show diag chassis’ - rommon with ‘dumpplaneeeprom’ - rear of the FCC and front of the LCC • Rack 0 or 1 = d. SC (also an LCC) • Rack 1 -> 127 = LCC • Rack f 0 -> f 4 = FCC Note: Rack numbers have to be unique Example: RP/0/RP 0/CPU 0: CRS 3#admin show run | i dsc Building configuration. . . dsc serial TBA 10080000 rack 1 dsc serial TBA 10090001 rack 0 dsc serial TBA 10120000 rack f 0 © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 10

Thank you.