The issue with the LACP port channel not coming up between Switch-1 and Switch-2 is due to both switches being configured with "channel-group mode passive". For an LACP (Link Aggregation Control Protocol) to establish a connection, at least one end must be configured to actively seek the establishment of a channel, which is done by setting "channel-group mode active". In this case, configuring Switch-1 with "channel-group mode active" will initiate the LACP negotiation process, allowing the port channel to come up.