Bandwidth Oversubscription - Cisco CRS-1 - Carrier Routing System Router Hardware Installation Manual

Bandwidth Oversubscription

Table 3-1 SPA Summary (continued)
SPA
8-Port OC-12c/STM-4 Multirate POS SPA
2-Port OC-48c/STM-16 POS/RPR SPA
4-Port OC-48c/STM-16 POS/RPR SPA
1-Port OC-192c/STM-64 POS/RPR XFP SPA
1-Port OC-192c/STM-64 POS/RPR VSR Optics SPA
5-Port Gigabit Ethernet SPA
8-Port Gigabit Ethernet SPA
10-Port Gigabit Ethernet SPA
1-Port 10-Gigabit Ethernet SPA
2-Port Clear Channel T3/E3 SPA
4-Port Clear Channel T3/E3 SPA
Bandwidth Oversubscription
Oversubscribing the bandwidth limit recommendations of a router can result in decreased or degraded
performance. For this reason, it is important to determine the amount of bandwidth used by the SPAs on
the router and verify that the total bandwidth used by all SPAs does not exceed the recommended
bandwidth limit of the router. It is also important not to exceed the bandwidth of the SIP. For information
on SIP bandwidth, see the
The processing on the Cisco CRS-1 SIP-800 is performed by two PLIM ASICs, each of which can
process up to 20 Gbps of traffic. SPA subslots 0, 1, and 3 are associated with one PLIM ASIC, while
SPA subslots 2, 4, and 5 are associated with the second PLIM ASIC. See
Figure 3-1
1
Cisco CRS-1 Carrier Routing System SIP and SPA Hardware Installation Guide
3-2
"SIP Summary" section on page
Cisco CRS-1 SIP-800 Slot Locations
subslot 0
subslot 3
Subslots controlled by one PLIM ASIC
Chapter 3
SPA Part Number
SPA-8XOC12-POS
SPA-2XOC48POS/RPR
SPA-4XOC48POS/RPR
SPA-OC192POS-XFP
SPA-OC192POS-VSR
SPA-5X1GE-V2
SPA-8X1GE
SPA-8X1GE-V2
SPA-10X1GE-V2
SPA-1X10GE-L-V2
SPA-1X10GE-WL-V2
SPA-2XT3/E3
SPA-4XT3/E3
1
subslot 1
subslot 4
2 Subslots controlled by second PLIM ASIC
Overview: Cisco CRS-1 Shared Port Adapters
Number Minimum Cisco
of Ports IOS XR Software
8 Release 3.3.0
2 Release 3.4.0
4 Release 3.4.0
1 Release 3.2
1 Release 3.4.1
5 Release 3.4.0
8 Release 3.2
Release 3.4.0
10 Release 3.4.0
1 Release 3.4.0
Release 3.5.0
2 Release 3.4.1
4 Release 3.4.1
2-1.
Figure 3-1 for subslot locations.
subslot 2
subslot 5
2
Minimum
Hardware
Revision
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
OL-17439-01