From: Carlos Alberto Trujillo Jimenez (carlos.trujillo.jimenez@gmail.com)
Date: Mon Mar 03 2008 - 19:08:06 ARST
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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