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New Member

SIP and SPA for 7603S with RSP720-10GE


We want to use STM4 on our 7603s router which has RSP720-10GE as mainboard.

What kind of SIP and SPA should I buy?

Thank you

  • WAN Routing and Switching

SIP and SPA for 7603S with RSP720-10GE

I see three STM-4 / OC-12 SPAs (ATM, POS and channelized POS), so I guess the choice depends on what you'll be using it for.  All three require SIP-400.

New Member

SIP and SPA for 7603S with RSP720-10GE

Hi Lulian

Thank you for your reply

I don't know the exact difference between POS and channelized POS.

We want to use it as our company's uplink with an ISP.

Right now we have a STM1 POS link with them and we want to increase our bandwidth.

I think it should be POS not channelized POS but I’m not sure. The word channelized here reminds me of VOIP and things like that.

If it helps, our STM1 POS is like this:

POS1/0 is up, line protocol is up

  Hardware is Packet over Sonet

  Internet address is x.x.x.x/30

  MTU 4470 bytes, BW 155000 Kbit, DLY 100 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation HDLC, crc 16, loopback not set

  Keepalive set (10 sec)

  Scramble disabled

  Last input 00:00:01, output never, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1060846

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  30 second input rate 0 bits/sec, 0 packets/sec

  30 second output rate 0 bits/sec, 0 packets/sec

     2275171444 packets input, 2154355270171 bytes, 0 no buffer

     Received 0 broadcasts, 49331479 runts, 2 giants, 0 throttles

              0 parity

     538651 input errors, 531155 CRC, 0 frame, 440 overrun, 0 ignored, 685 abort

     6347218581 packets output, 1351209267985 bytes, 0 underruns

     0 output errors, 0 applique, 3 interface resets

     0 output buffer failures, 0 output buffers swapped out

     0 carrier transitions

Re: SIP and SPA for 7603S with RSP720-10GE

Well, I've never worked with channelized POS interfaces, but I'm guessing it's the same idea as with the old framed E1/T1 controllers, of which you could use only part of the capacity (any number of time-slots);  and, just as you had, for example, "interface serial 0/0:1" to designate such "sub-capacity", you would have "interface pos 1/0:1" here.

Basically this type of POS would allow for "intermediary" capacities between STM1 (~155Mbps) and STM4 (~622Mbps) (and up to STM1, of course) - I guess this is not your case, so your choice would be the unchannelized SPA (SPA-1XOC12-POS).

_But_, digging a little further I found that SPA-1XOC12-POS is end-of-sale, its recommended replacement being SPA-2XOC12-POS (which is not mentioned in the link I posted earlier):

The two-port SPA is, however, mentioned in another chapter of the same document, where it is said that support for it on the 7600 platform with SIP-400 was introduced in IOS 15.2(4)S:

So, as I see it, if you need very long-term support for your SPA you'd have to go for SPA-2XOC12-POS and at least IOS 15.2(4)S;  otherwise SPA-1XOC12-POS (supported since IOS 12.2(18)SXE) should be fine.

New Member

Re: SIP and SPA for 7603S with RSP720-10GE

Hi Lulian

Thank you again for your reply

As you said we should have IOS 15.2(4)S to be able to use SPA-2XOC12-POS but my IOS version is 15.2(2)S1.

Is it possible for us to use SPA-2XOC12-POS with this IOS or we should change it?

And two more questions, is there just one kind of SIP-400? and is it possible to use SIP-400 on both 7603 and 7603S chassis?

Below is the output of show version in our router:

Cisco IOS Software, c7600rsp72043_rp Software (c7600rsp72043_rp-IPSERVICES-M), Version 15.2(2)S1, RELEASE SOFTWARE (fc1)

Technical Support:

Copyright (c) 1986-2012 by Cisco Systems, Inc.

Compiled Tue 22-May-12 13:55 by prod_rel_team

ROM: System Bootstrap, Version 12.2(33r)SRE, RELEASE SOFTWARE (fc1)

BOOTLDR: Cisco IOS Software, c7600rsp72043_rp Software (c7600rsp72043_rp-IPSERVICES-M), Version 15.2(2)S1, RELEASE SOFTWARE (fc1)

7603-1 uptime is 29 weeks, 2 days, 15 hours, 44 minutes

Uptime for this control processor is 29 weeks, 2 days, 15 hours, 49 minutes

System returned to ROM by reload (SP by reload)

System restarted at 22:16:10 UTC Mon May 20 2013

System image file is "sup-bootdisk:c7600rsp72043-ipservices-mz.152-2.S1.bin"

Last reload type: Normal Reload

Last reload reason: Reason unspecified

Cisco CISCO7603-S (M8500) processor (revision 1.0) with 917504K/65536K bytes of memory.

Processor board ID FOX1529GEJZ


CPU: MPC8548_E, Version: 2.1, (0x80390021)

CORE: E500, Version: 2.2, (0x80210022)

CPU:1200MHz, CCB:400MHz, DDR:200MHz,

L1:    D-cache 32 kB enabled

        I-cache 32 kB enabled

Last reset from power-on

1 Virtual Ethernet interface

3 Gigabit Ethernet interfaces

2 Ten Gigabit Ethernet interfaces

3964K bytes of non-volatile configuration memory.

500472K bytes of Internal ATA PCMCIA card (Sector size 512 bytes).

Configuration register is 0x2102

Re: SIP and SPA for 7603S with RSP720-10GE

There's only one kind of SIP-400, I'm not sure what would happen if you try to run a piece of hardware under unsupported IOS, and I can find no evidence of the SIPs not being supported in the 7603 (non-S) chassis.

Also, I'd go for IOS 15.2(4)S4, but that's just a personal thought - opinions of more experienced people are welcome just about now ...

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