Troubleshooting Oversubscription on the Cisco 7600 SIP-400

Troubleshooting Oversubscription on the Cisco 7600 SIP-400

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 OC-3 or OC-12 POS 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 or OC-12 POS or ATM SPAs up to a combined ingress bandwidth of OC-24 rates, when installed with a single 2-Port Gigabit Ethernet SPA.

Configurations on the Cisco 7600 SIP-400 with an unsupported aggregate SPA bandwidth greater than OC-48 rates generates the following error message:

SLOT 3: 00:00:05: %SIPSPA-4-MAX_BANDWIDTH: Total SPA bandwidth exceeds line card capacity 
of 2488 Mbps

Reference: http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/7600series/76tblsip.html#wp1045445