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BigIron MG8 hight CPU load on LP card
Hallo
We have the router :
HW: BigIron MG8 Router
SL M1: BIMG8-MR Management Module
Boot: Version 2.3.0jT105 Copyright © 1996-2003 Foundry Networks, Inc.
Monitor: Version 2.3.0jT105 Copyright © 1996-2003 Foundry Networks, Inc.
IronWare: Version 2.3.0jT103 Copyright © 1996-2003 Foundry Networks, Inc.

Module Status Ports Starting MAC
M1 (upper): BIMG8-MR Management Module Active
M2 (lower): BIMG8-MR Management Module Standby (Ready State)
F1: BIMG8-SFM Switch Fabric Module Active
S1: BIMG8-1Gx40-SFP-v6 40 -port 1 GbE IPv4/v6 Module (IPv6 + OACL)
CARD_STATE_UP 40
S5: BIMG8-10Gx8-v6 8 -port 10GbE IPv4/v6 Module (IPv6 + OACL)
CARD_STATE_UP 8
S8: BIMG8-10Gx4-v6-A 4 -port 10GbE IPv4/v6 Module (IPv6 + OACL)
CARD_STATE_UP 4

We have 5 BGP uplinks come through two 10Gb ports 5 and 8 modules. and
five switches with servers connected 1Gb ports in 1 module .

When the total traffic of up to 1 gigabit but a relatively large number
of small packets 400-600 Kpps cpu first module is loaded at 100% and
start losing 80-90%.
while CPU on the control module and 10G modules in slots 5 and 8 are not
loaded .

it looks like this:
show cpu lp
SLOT #: LP CPU UTILIZATION in%:
in 1 second: in 5 seconds: in 60 seconds: in 300 seconds:
1 96 96 100 100
5 0 0 1
1
8 0 0 0
0

show cpu
... Usage average for all tasks in the last 1 seconds ...
================================================== ========
Name us /sec %
idle 665002 100
...

if the number of packets reaches 1Mpps already traffic through 1 module
does not go
and recovered only work when disconnected stream of small packets .

May be someone faced with a similar problem or have ideas what can i do?
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Re: BigIron MG8 hight CPU load on LP card [ In reply to ]
You should be able to log into the LP and do a debug packet cap. That
will show you what packets are hitting the LP cpu.


On 2/24/2014 9:48 AM, sergp@soho.net.ua wrote:
> Hallo
> We have the router :
> HW: BigIron MG8 Router
> SL M1: BIMG8-MR Management Module
> Boot: Version 2.3.0jT105 Copyright © 1996-2003 Foundry Networks, Inc.
> Monitor: Version 2.3.0jT105 Copyright © 1996-2003 Foundry Networks, Inc.
> IronWare: Version 2.3.0jT103 Copyright © 1996-2003 Foundry Networks, Inc.
>
> Module Status Ports Starting MAC
> M1 (upper): BIMG8-MR Management Module Active
> M2 (lower): BIMG8-MR Management Module Standby (Ready State)
> F1: BIMG8-SFM Switch Fabric Module Active
> S1: BIMG8-1Gx40-SFP-v6 40 -port 1 GbE IPv4/v6 Module (IPv6 + OACL)
> CARD_STATE_UP 40
> S5: BIMG8-10Gx8-v6 8 -port 10GbE IPv4/v6 Module (IPv6 + OACL)
> CARD_STATE_UP 8
> S8: BIMG8-10Gx4-v6-A 4 -port 10GbE IPv4/v6 Module (IPv6 + OACL)
> CARD_STATE_UP 4
>
> We have 5 BGP uplinks come through two 10Gb ports 5 and 8 modules. and
> five switches with servers connected 1Gb ports in 1 module .
>
> When the total traffic of up to 1 gigabit but a relatively large
> number of small packets 400-600 Kpps cpu first module is loaded at
> 100% and start losing 80-90%.
> while CPU on the control module and 10G modules in slots 5 and 8 are
> not loaded .
>
> it looks like this:
> show cpu lp
> SLOT #: LP CPU UTILIZATION in%:
> in 1 second: in 5 seconds: in 60 seconds: in 300 seconds:
> 1 96 96 100 100
> 5 0 0 1
> 1
> 8 0 0 0
> 0
>
> show cpu
> ... Usage average for all tasks in the last 1 seconds ...
> ================================================== ========
> Name us /sec %
> idle 665002 100
> ...
>
> if the number of packets reaches 1Mpps already traffic through 1
> module does not go
> and recovered only work when disconnected stream of small packets .
>
> May be someone faced with a similar problem or have ideas what can i do?
> _______________________________________________
> foundry-nsp mailing list
> foundry-nsp@puck.nether.net
> http://puck.nether.net/mailman/listinfo/foundry-nsp
>

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Re: BigIron MG8 hight CPU load on LP card [ In reply to ]
* sergp@soho.net.ua (sergp@soho.net.ua) [Mon 24 Feb 2014, 17:49 CET]:
>HW: BigIron MG8 Router

This is a shot in the dark but try configuring "no ip icmp redirect".
Especially if you use this router to route packets between VLANs on
the same physical interface. IMO it's a bug that this isn't there by
default (and I think this was changed somewhere down the line).

Otherwise, try the "debug packet capture"-on-linecard trick to see
what traffic is hitting the LC CPU.


-- Niels.

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