05-05-2011 08:32 AM - edited 03-04-2019 12:17 PM
Hello,
I've just taken delivery of some Cisco 887's. I've noticed that on power up, it shows 1 ethernet interface and 4 fastethernet interfaces, yet there
are only 4 physical ethernet interfaces, can anyone tell me what the 1 ethernet interface is?
Thanks
05-05-2011 10:04 AM
Hi,
It's ADSL2/2+ over POTS (Annex A). Please check this link.
Ref: http://www.cisco.com/en/US/prod/collateral/routers/ps380/data_sheet_c78_459542.html
HTH,
Toshi
05-06-2011 12:03 AM
Hi,
In 877 all interfaces are switch ports (L2 ports) except the FastEthernet4 where you can termintate your WAN link like DSL...
See the below interface output from on of my 877.
#sh ip int brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0 unassigned YES unset up down
FastEthernet1 unassigned YES unset up down
FastEthernet2 unassigned YES unset up up
FastEthernet3 unassigned YES unset up up
FastEthernet4 85.102.189.206 YES NVRAM up up
Please click on the correct answer on all posts if they answered your question.
Regards,
Naidu.
05-06-2011 01:31 AM
Thanks for the replies. On power up I see the following interfaces
1 DSL controller
1 Ethernet interface
4 FastEthernet interfaces
1 ATM interface
1 Virtual Private Network (VPN) Module
256K bytes of non-volatile configuration memory.
125440K bytes of ATA CompactFlash (Read/Write)
And show ip int br shows
Interface IP-Address OK? Method Status Prol
ATM0 unassigned YES unset administratively down dow
Ethernet0 unassigned YES unset administratively down dow
FastEthernet0 unassigned YES unset up dow
FastEthernet1 unassigned YES unset up dow
FastEthernet2 unassigned YES unset up dow
FastEthernet3 unassigned YES unset up dow
Vlan1 unassigned YES unset up dow
so I still dont really understand the 5 ethernet interfaces
05-06-2011 03:03 AM
Hi,
Sorry guys, I missed reading what you posted. Its not a physical interface. Ethernet0 is a virtual interface that is used for VDSL configuration.
HTH,
Toshi
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