[cisco-nas] RE: Lost fragments shdsl mlp

[Aaron Leonard]

Not clear to me from your posting what your overall lost fragment : 
MLPPP frame ratio is.
If you're losing like one fragment per 10000 MLPPP frames, I probably 
wouldn't lose any sleep over it.

Now, if you really ARE seeing performance problems which are associated 
with these lost fragments, then I would first focus on how the member 
links are behaving.  Are you seeing any layer 1 errors on them?  Are you 
getting lost cells?  Etc.

If it looks like the member links are behaving perfectly but you are 
nonetheless seeing lost fragments, then you way want to fiddle with the 
"ppp multilink slippage" knob.  We haven't properly documented this, but 
you can see some info on it here:

http://www.cisco.com/en/US/products/sw/iosswrel/ps5012/prod_release_note09186a008027c166.html#wp66578

Cheers,

Aaron

------------------------------------------------------------------------

> RE: Lost fragments shdsl multilink
>
> Hi
>
> I'm multilinking two shdsl links , but when i do i get lost fragments
>
> Virtual-Access4, bundle name is DSLStack
>   Endpoint discriminator is DSLStack
>   Bundle up for 00:23:49, 27/255 load, 2 receive classes, 1 transmit classes
>   Receive buffer limit 24384 bytes per class, frag timeout 1000 ms
>   Dialer interface is Dialer1
>   Receive Class 0:
>     0/0 fragments/bytes in reassembly list
>     2726 lost fragments, 164501 reordered
>     2681/2036853 discarded fragments/bytes, 2700 lost received 
> <<<<<<<<<<<<<<
>     0x7F8EC received sequence
>   Receive Class 1:
>     0/0 fragments/bytes in reassembly list
>     0 lost fragments, 0 reordered
>     0/0 discarded fragments/bytes, 0 lost received
>     0x0 received sequence
>   Member links: 2 (max 2, min not set)
>     Vi2, since 00:23:49
>     PPPoATM link, ATM PVC 0/38 on ATM0/1.1
>     Packets in ATM PVC Holdq: 0, Particles in ATM PVC Tx Ring: 0
> Vi3, since 00:23:49
>     PPPoATM link, ATM PVC 0/38 on ATM0/0.1
>     Packets in ATM PVC Holdq: 0, Particles in ATM PVC Tx Ring: 0
> No inactive multilink interfaces
>
>
> interface Dialer1
> mtu 1448
> bandwidth 4096
> no ip proxy-arp
> ip rip advertise 25
> encapsulation ppp
> no ip route-cache cef
> no ip route-cache
> dialer pool 1
> dialer idle-timeout 0
> no peer default ip address
> no cdp enable
> ppp max-bad-auth 3
> ppp multilink
> ppp hostname <l>
> ppp pasword <l>
> ppp multilink fragment disable
> ppp multilink links maximum 2
> ppp multilink mrru remote 1448
> ppp multilink multiclass
>
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