From: dalek77@cox.net
Date: Mon Mar 03 2008 - 18:58:25 ARST
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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