SFP Overview
The ESR6300 supports two WAN ports with RJ45 and optical/copper SFP ports.
The 2 Combo-WAN ports are g0/0/0 and g0/0/1. Each port can either be in Copper RJ45 or SFP mode, which is software configurable.
The SFP Ports have the following characteristics:
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Optical interface and Copper RJ45 are supported
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Whichever link is connected first is detected as default by software
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Auto-negotiation is supported for 10Mbps, 100Mbps and 1000Mbps
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Both Optical and Cu SFPs are supported, GE and FE alike
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Copper FE SFPs are not supported on ESR6300
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Auto-negotiation for 10Mbps, 100Mbps, 1000Mbps in full-duplex and half-duplex mode is supported. For half duplex, Cisco supports only 10Mbps and 100Mbps.
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Auto-select is supported. Whichever interface is detected first is selected. Typically fiber SFP will come up faster than RJ45 Copper, and is faster than Copper SFP.
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RJ45 to SFP mode conversion involves an interface reset (shut/no shut, interface DOWN/UP). The syslog can be observed accordingly.
Note |
Prior to release 17.2.1, Jumbo MTU support is not available on the ESR6300. MTU>1500 packets will be fragmented. From release 17.2.1 going forward, MTU support is 64 - 9216 on the interface. If there are bursts of fragmented traffic expected beyond the device Non-drop rate capability, software implements a throttling mechanism and transmits MAC Pause frames to the other end to reduce rate of traffic. To resume normal operation, arp has to sent again to re-negotiate. The default ip arp timeout is 14,000 seconds. In these rare case scenarios, it is recommended to have much shorter arp timeout configurations. |
Supported SFPs are found in the ESR6300 Hardware Technical Guide here:
SFP Command Line
To configure the WAN port as an RJ45 or an SFP:
Router#config terminal
Router(config)#config terminal
Router(config)#interface g0/0/{0|1}
Router(config-if)#media type ?
auto-select Use whichever connector is attached
rj45 Use RJ45 connector
sfp Use SFP connector
To configure auto-failover:
Router(config-if)#media-type {rj45|sfp} ?
auto-failover Automatic Fail over
<cr> <cr>
To validate your changes, use the following commands.
If SFP is detected:
Router#show inventory
To see if your configuration has taken effect:
Router#show run int g0/0/{0|1}
To reload the gigabit ethernet module:
Router#hwmodule subslot 0/0 reload force