LACP Cisco 2 AlCatel

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May 2nd, 2007
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We're trying to connect remote outlets to our corporate. All links from remote sites will be Ethernet based and aggregate to centrilized setup.

The links will be on a particular VLAN (L2) and shall terminate on the trunk ports at the central site. The GE links will be coming from IP/MPLS node of Alcatel (ISP) with Multi-chassis Link Aggregation (LEG) such that redundancy will be possible. The central switch will be L3 based.

LAG enables dual-homed links from any IEEE 802.3ad standards-based access device (e.g. IP DSLAM, Ethernet switch or Video on Demand server) to multiple Layer 2 or Layer 3 aggregation nodes. In contrast with slow recovery mechanisms such as Spanning Tree, multi-chassis LAG provides synchronized and stateful redundancy for VPN services or triple play subscribers in the event of the access link or aggregation node failing, with zero impact to end users and their services.

now LAG at Alcatel ISP switch will run as active/standby and my central Cisco switch will use LACP for link aggregation.. is there any issue on that ? how to convert LACP to work as active/standby not as loadsharing to synchronize the process with Alcatel ?

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