[c-nsp] Cisco2921 vs 7206VXR/NPE-400

[cnsp at marenda.net]

That are good news,
since 720x seem to be EOL etc.

So with "supported" Hardware for the next years,
replacement for the 7206VXR/NPE400 G1 G2 or 7201 7301
may be either ASR or 3925E .

But what happens with traffic which needs to be fragmented?
How does the 29xx 39xx perform?

>From the 870's I know that I get just 3.x Mbit/s traffix thru
if I use an l2tpv3 with ipesc 
and every "wan" paket needs to be fragmented with the l2tp and ipesc
overhead
(CPU load is then 100%)

The 892 is at 8.3 Mbit/s LAN and 10Mbit/s WAN (lstpv3 over ipsec)
at 34 % CPU so I think it can handle 25 Mbit/s for this scenario.

How do the 29x/39xx behave ?

> we just this year went through similar migrations - we had 2 7206 w/npe
> G2.  BGP 400K routes replaced them with 3925s - which seemed overkill
> at the time - still is.
> 
> Internally as we are moving 10M to 1G circuits to new gear we are going
> with 29xx and 4451s at the core ( we thought about the ASR and like its
> performance, the 4451 emulates the ASR chip but the 4451 seems to be
> more flexible in terms of features.
> 
> We hooked up to 2921 back to back and did some iperf/ftp traffic flows
> with NAT and got well over 500Mb through it .
> Your mileage of course will vary .. NAT, QOS, IPSEC, ....