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Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide
OL-5052-14
Chapter 3 Overview: Cisco 7600 Series Router Shared Port Adapters
Bandwidth Oversubscription
Cisco 7600 SIP-400 Oversubscription Guidelines
As of Cisco IOS Release 12.2(18)SXF, when using the Cisco 7600 SIP-400 with the 2-Port Gigabit
Ethernet SPA or the 1-Port OC-48c/STM-16 ATM SPA, consider the following oversubscription
guidelines:
•
The Cisco 7600-SIP-400 only supports installation of one 1-Port OC-48c/STM-16 ATM SPA
without any other SPAs installed in the SIP.
•
The Cisco 7600-SIP-400 supports installation of up to two 2-Port Gigabit Ethernet SPAs without
any other SPAs installed in the SIP.
•
The Cisco 7600-SIP-400 supports installation of any combination of a OC-3, OC-12 POS, CEoP, or
ATM SPAs, up to a combined ingress bandwidth of OC-48 rates.
•
The Cisco 7600-SIP-400 supports installation of any combination of OC-3, OC-12 POS, CEoP, or
ATM SPAs up to a combined ingress bandwidth of OC-24 rates, when installed with a single 2-Port
Gigabit Ethernet SPA.
•
The Cisco 7600-SIP-400 supports installation of a single 1-Port 10-Gigabit Ethernet SPA without
any other SPAs installed in the 7600-SIP-400.
Note
A 1-Port 10-Gigabit Ethernet SPA on a 7600-SIP-400 provides 4 Gbps of bandwidth.
•
A maximum of 32 total ingress SPI-4 ports are supported on the SIP-400. Ethernet SPAs use 2 SPI
Port per interface. If a SPA which causes the total required SPI-4 ports on SIP-400 to exceed 32, that
SPA will not be permitted to power up.
For example, if you insert the SPA-5x1GE into the SIP-400, where SPAs already inserted have
consumed at least 23 SPI ports, the following error message will be posted on the console:
SPI-4 port limit exceeded, SPA-5X1GE in subslot 3 has been powered down.
•
The Cisco 7600 supports four 4-port FE SPAs or two 8-port FE SPA in SIP-400 in one shot
The following table lists the different SPA types and the total SPI ports consumed by them on a SIP-400:
SPA PID
Total SPI ports consumed
POS SPAs
SPA-1XOC12-POS
1
SPA-2XOC3-POS
2
SPA-4XOC3-POS
4
SPA-1XOC48-POS
1
Ethernet SPAs
SPA-2XGE
4
SPA-2XGE-V2
4
SPA-5XGE-V2
10
SPA-1X10GE-V2
2
SPA-4XFE-TX-V2
8
SPA-8XFE-TX-V2
16
ATM SPAs
SPA-2XOC3-ATM
2