Hola, 

Si existe una limitante de capacidad en SIP-800, y te deshabilitara las tarjetas en caso de oversubscription SOLO en caso
de que tengas SPAs de distinto tipo, por ejemplo POS.

Como lo puedes ver a detalle en el siguiente link al excederse deshabilita las tarjetas.

Sin embargo si solo utilizas Gigabit SPAs no tendiras ningun problema y se pueden utilizar aun con
oversubscription.   

http://cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/inst all_upgrade/crs/crs1/installation/guide/crssipov.html#wp1093328http://cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/install_upgrade/crs/crs1/installation/guide/crssipov.html#wp1093328
 
"Subslots 0, 1, and 3 can provide up to 20 Gbps of capacity, as can
subslots 2, 4, and 5. Take care not to install SPAs that require more
than 20 Gbps of capacity in each group of subslots so as not to
oversubscribe the card."

Tambien puedes ver a detalle lo de las Gig Ethernet.

http://cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/install_upgrade/crs/crs1/installation/guide/crsspaov.html#wpxref43547

"If you are using only Gigabit Ethernet SPAs on
the Cisco CRS-1 SIP-800, then the SIP can be oversubscribed. The
Cisco CRS-1 SIP-800 can pass a maximum of 40 Gbps of traffic, so if you
have six 8-Port Gigabit Ethernet SPAs operating at almost full capacity, the SIP is oversubscribed"

espero esta informacion te sirva
Detallo a continuacion la respuesta en ingles, para que esta tambien sirva a clientes en otros idiomas.

Saludos
Yesua

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Gigabit Ethernet Oversubscription on SIP-800 CRS-1


If you need to add more SPAs to your SIP card, please review the following doc, you can safely oversubscribe for GE interfaces, 
however some restrictions appear when using other SPAs.
http://cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/install_upgrade/crs/crs1/installation/guide/crsspaov.html#wpxref43547


If you are using only Gigabit Ethernet SPAs on
the Cisco CRS-1 SIP-800, then the SIP can be oversubscribed. The
Cisco CRS-1 SIP-800 can pass a maximum of 40 Gbps of traffic, so if you
have six 8-Port Gigabit Ethernet SPAs operating at almost full capacity, the SIP is oversubscribed

regards
Yesua.

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