From: Mounir Mohamed (mounir.mohamed@hotmail.com)
Date: Mon Mar 03 2008 - 21:04:28 ARST
i recommend to post it on Cisco NetPro
http://forums.cisco.com/eforum/servlet/NetProf?page=main
-- Best Reagrds,Mounir Mohamed> Date: Mon, 3 Mar 2008 17:08:06 -0400> From:
carlos.trujillo.jimenez@gmail.com> To: dalek77@cox.net> Subject: Re: ARGH!!!!
IPv6 packet loss Issue on Cat 6509s ARGH!!!!!> CC: ccielab@groupstudy.com> >
In your problem you are focusing in IPV6, (assuming an ipv6 performance>
problem in the switch).> have you tried the same test using IPV4??> > > > >
2008/3/3, dalek77@cox.net <dalek77@cox.net>:> >> > Hey all,> >> > I'm having
packet loss issues through two 6509s connected back to back,> > described
below. No matter what rate, 10 meg up to 1000 meg, I'm getting> > about 50%
packet loss using a Smartbits 6000C to generate IPv6 traffic on> > Vlan 30 and
receiving the unicast stream on Vlan 50 with 1024 or 1500 frame> > sizes. The
two CAT 6509s have Sup 720 3Bs and 12.2(18)sxd7b loaded on> > them. It seems
everything pings through fine and routing is correct, hell> > it's only one
hop, but whenever I run Smartbits I get crappy results. I> > used OSPFv3 and
even tried static, but layer 3 seems fine as I can ping vlan> > 50 sourced
from vlan 30 and vice versa. I turned on "ipv6 cef distributed"> > and " ipv6
mfib hardware..." and it did nothing. I'm wondering if anyone> > here can
check my config and notice anything I missed or forgot to turn on> > or maybe
it's the smartbits testing gear that is screwed. I did hookup the> > Smartbits
through just one 6509 on two ports and it was fine, so I don't> > think it is
the test gea!> > r. Forgive any typos, I'm typing this out of my head, for
certain reasons> > I can't copy and xfer the configs from the switches here.>
>> > No errors on any interfaces either. sh ipv6 route shows the correct> >
routes learned via ospf with the correct link-local ont he other side of> >
g1/48. Also, the link-local is resolving, verified with "sh ipv6> >
neighbors". I'm pulling my hair out and I hope somebody can help me,> >
thanks!! And this is the latest IOS in the train we use. :\> >> >> > Vlan 30
---> 6509A <--GigE--> 6509B <--- Vlan 50> >> >> > 6509A> >> > ipv6
unicast-routing> > ipv6 cef distributed> > ipv6 mfib hardware> >> > int vlan
30> > ipv6 address 2001:480::1/64> > ipv6 ospf 200 area 0> >> > int g1/48> >
description Connection to 6509B> > ipv6 address 2001:480:250:1::2/64> > ipv6
ospf 200 area 0> >> > int g2/41> > description Connection to Test Gear> >
switchport access vlan 30> > switchport mode access> > speed 1000> > duplex
full> >> > 6509B> >> > ipv6 unicast-routing> > ipv6 cef distributed> > ipv6
mfib hardware> >> > int vlan 50> > ipv6 address 2001:480:2::1/64> > ipv6 ospf
200 area 0> >> > int g1/48> > description Connection to 6509A> > ipv6 address
2001:480:250:1::1/64> > ipv6 ospf 200 area 0> >> > int g2/41> > description
Connection to Test Gear> > switchport access vlan 50> > switchport mode
access> > speed 1000> > duplex full> >> > Thanks,> >> > Dale> >> >
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