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shabake_karan
کلا سوئیچ ها با tunneling مشکل دارند. اما به جای IP-IP از GRE استفاده کن. شاید با ارتقاء IOS حل بشه. شاید!! ب
سلام
البته سوئیچ ها (3750 و 3550) با GRE هم مشکل دارند.
High CPU Utilization After Enabling GRE Tunnels
Generic Routing Encapsulation (GRE) tunnels are not supported on the Cisco Catalyst 3550 Switch. Even though the CLI commands are there to configure the GRE, it is not officially supported. Refer to the
Unsupported VPN Configuration Commands section of
Unsupported CLI Commands for Catalyst 3550 for this information. The reason for this is that the Cisco Catalyst 3550 Switch uses hardware-based Cisco Express Forwarding (CEF) switching. There is no method to CEF-switch GRE packets. GRE packets must be encapsulated by the software. The hardware does not have the capability to encapsulate the packets. Consequently, this traffic is processed or software switched. The process or software switched traffic can quickly cause the CPU to spike
کد HTML:
http://ciscosystems.com/en/US/products/hw/switches/ps646/products_tech_note09186a008078ece1.shtml#Pr1
شاید مشکل دوستمون با IPIP هم به همین دلیل باشه.