Datasheet

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Page 11 of 28
Q. Which SFPs are supported on Cisco 3800 Series?
A. Only SFPs made by Cisco are supported on the Cisco 3800 Series. SFPs from other vendors will not be enabled. Table 8 shows a list of all
supported optical SFPs. Copper SFPs are not supported, as RJ-45 connectors are built into the platforms.
Table 8. SFP Part Numbers and Descriptions
Part Number Description
GLC-LH-SM= Gigabit Ethernet SFP, LC connector, LX/LH transceiver
GLC-SX-MM= Gigabit Ethernet SFP, LC connector, SX transceiver
GLC-ZX-SM= 1000BASE-ZX SFP
CWDM-SFP-1470= Coarse wavelength-division multiplexing (CWDM) 1470-nm SFP Gigabit Ethernet and 1G/2G Fibre Channel (FC)
CWDM-SFP-1490= CWDM 1490-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1510= CWDM 1510-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1530= CWDM 1530-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1550= CWDM 1550-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1570= CWDM 1570-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1590= CWDM 1590-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1610= CWDM 1610-nm SFP Gigabit Ethernet and 1G/2G FC
Q. Is OIR supported on the SFP module slot?
A. Yes. OIR is supported on the SFP module slot.
Q. Can Auto-Negotiation be turned off for the on-board Gigabit Ethernet ports of Cisco 3800 ISRs when the speed is set to 1000?
A. Auto-Negotiation can be turned off in 1000BASE-X (SFP) operation but not in 1000BASE-T (RJ-45) mode. Annex 28D.5 Extensions within
Clause 40 of IEEE 802.3 specification for 1000BASE-T requires auto-negotiation to be used in 1000BASE-T (RJ-45) operation. There are no
standards defined for 1000BASE-T (RJ-45) operation without auto-negotiation. In order to comply with the standard, the auto-negotiation will
always be enabled in 1000BASE-T (RJ-45) mode and speed and duplex can not be forced.
Q. Is Auto-Negotiation CLI “negotiation auto” still available on the Gigabit Ethernet ports of Cisco 3800 ISRs?
A. No, the original CLI “negotiation Auto” and “no negotiation auto” are no longer available on the two onboard Gigabit Ethernet ports starting
from IOS release 12.4(4) and 12.4(2)T3. In order to turn on the auto negotiation, customers will have to set either speed or duplex to auto or set both
speed and duplex to auto.
3845(config)#int gigabitEthernet 0/0
3845(config-if)#speed auto
3845(config-if)#duplex auto
Q. Is Cisco EtherChannel
®
supported on the two onboard Gigabit Ethernet ports?
A. No. Cisco EtherChannel is not supported on the onboard Gigabit Ethernet ports. Instead, Cisco EtherChannel can be configured on Gigabit
Ethernet HWICs, Gigabit Ethernet network modules, and Fast Ethernet ports on Cisco EtherSwitch HWICs and network modules when the ports
are in switchport mode.