Cisco GSR, Gig Ethernet config?

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1

Our configuration: a GSR12008 with two interfaces, an OC12 ATM to the WAN
and a gig ethernet to the campus, serving as a border drain.

Does someone have real experience configuring this box with SFCs and
CSCs? Is a full switch fabric (3 SFCs) and second CSC required or
desirable for the gig ethernet interface to work? Could we expect to
support a second gig ethernet interface? So many questions!

Thanks,
John Haskins
jhaskins@commserv.ucsb.edu
Communications Services
University of California
Santa Barbara

2

Our configuration: a GSR12008 with two interfaces, an OC12 ATM to the WAN
and a gig ethernet to the campus, serving as a border drain.

Does someone have real experience configuring this box with SFCs and
CSCs? Is a full switch fabric (3 SFCs) and second CSC required or
desirable for the gig ethernet interface to work?

required. you must have 3 SFCs.

Could we expect to
support a second gig ethernet interface? So many questions!

not at full bw; i believe this exceeds backplane bw.

3

Could we expect to
support a second gig ethernet interface? So many questions!

not at full bw; i believe this exceeds backplane bw.

Perhaps you are thinking of the 75xx? I believe the GSR has a 40 Gbps
backplane with something like 5 Gbps per slot. More than enough to support
a gig-E card at full line rate in each of the slots on the 12008. Of
course, whether the CPU, etc. can actually push that much - well, I dunno.
Anyone tried it?

John Haskins

TTFN,
patrick

I Am Not An Isp
www.ianai.net
ISPF, The Forum for ISPs by ISPs, <http://www.ispf.com>
"Think of it as evolution in action." - Niven & Pournelle

4

>> Could we expect to
>> support a second gig ethernet interface? So many questions!
>
>not at full bw; i believe this exceeds backplane bw.

Perhaps you are thinking of the 75xx? I believe the GSR has a 40 Gbps
backplane with something like 5 Gbps per slot. More than enough to support
a gig-E card at full line rate in each of the slots on the 12008. Of
course, whether the CPU, etc. can actually push that much - well, I dunno.
Anyone tried it?

my mistake. it is the TTM GE that can not handle full b/w.