You have used the two ESW module on one chassis together, you need understand below info.
NAME: "9 Port FE Switch on Slot 0 SubSlot 1", DESCR: "9 Port FE Switch"
PID: HWIC-D-9ESW , VID: V01 , SN: FOC12072R2X
NAME: "16 Port 10BaseT/100BaseTX EtherSwitch on Slot 1", DESCR: "16 Port 10BaseT/100BaseTX EtherSwitch"
PID: NM-16ESW , VID: V01 , SN: FOC13341F3Q
1/How many Cisco EtherSwitch modules can be installed on a Cisco 3800 Series system?
A. Up to two modules. Configurations with two modules require that the Cisco EtherSwitch modules are stacked. A Cisco EtherSwitch HWIC can be
stacked with a Cisco EtherSwitch network module by connecting the Gigabit Ethernet port of the network module to a Fast Ethernet port of a
HWIC card. Similarly, two Cisco EtherSwitch HWICs or network modules can be stacked by connecting to each other.
2/Prerequisites for Installing Two Ethernet Switch Network Modules in a Single Chassis
A maximum of two Ethernet switch network modules can be installed in a single chassis. If two Ethernet switch network modules of any type are
installed in the same chassis, the following configuration requirements must be met:
• Both Ethernet switch network modules must have an optional Gigabit Ethernet expansion board installed.
• An Ethernet crossover cable must be connected to the two Ethernet switch network modules using the optional Gigabit Ethernet expansion board ports.
• Intrachassis stacking for the optional Gigabit Ethernet expansion board ports must be configured. For information about intrachassis stacking configuration, see the
16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series feature module.
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/lanswitch/configuration/12-4/lsw-12-4-book.pdf3/Configuring Intrachassis Stacking
Router(config)# interface Gigabit slot/port
Router(config-if)# [no] switchport
stacking-link interface Gigabit slot/port
http://www.cisco.com/c/en/us/td/docs/ios/12_2/12_2z/12_2zj/feature/guide/fz1636nm.html#wp18260754/Intrachassis Stacking Example
The following example shows how to stack GE port 2/0 to GE port 3/0 to form an extended VLAN within one chassis:
Router #config terminal
Router(config)# interface Gigabit 2/0
Router(config-if)# switchport stacking-link interface Gigabit3/0
show interface
GigabitEthernet2/0 is up, line protocol is down
Internal Stacking Link Active : Gi2/0 is stacked with Gi3/0<<<<
http://www.cisco.com/c/en/us/td/docs/ios/12_2/12_2z/12_2zj/feature/guide/fz1636nm.html#wp1469343