[f-nsp] Brocade RX-4 to Cisco - Light but no link

[George B]

On the cisco side try "switchport nonegotiate" assuming their end is a
cisco switch or layer 2/3 router (and not a regular router port).

Note this has NOTHING to do with speed / duplex negotiation, it has to do
with the DTP (dynamic trunk protocol) Cisco uses to automatically put a
port into trunk mode if two cisco devices in default configurations are
connected.  This (DTP) can prevent Foundry/Brocade stuff properly linking
up.

On Mon, Sep 11, 2017 at 12:02 PM, Derek Maxwell <
derek.maxwell at chosentechgroup.com> wrote:

> Hi Aaron,
>
> Thanks for responding. They showed us at -12.2 on the last optic we had
> installed.
>
>
> On 9/11/17, 11:08 AM, "foundry-nsp on behalf of Aaron" <
> foundry-nsp-bounces at puck.nether.net on behalf of
> aaron at wholesaleinternet.net> wrote:
>
>     Light at your side is -11?  What is the other side?  Your receive may
> be
>     okay but what about their receive?  Unless this is a BIDI then you have
>     to check both fibers.
>
>     Aaron
>
>
>
>     On 9/11/2017 12:03 PM, Derek Maxwell wrote:
>     > Hello Franz,
>     >
>     > Yes, we have verified speed and auto-negotiate settings on both ends
> and tried every combination to no avail.
>     >
>     > Thank you.
>     >
>     >
>     > On 9/11/17, 5:21 AM, "foundry-nsp on behalf of Franz Georg Köhler" <
> foundry-nsp-bounces at puck.nether.net on behalf of lists at openunix.de> wrote:
>     >
>     >      On Mi, Sep 06, 2017 at 07:53:57 +0000, Derek Maxwell <
> derek.maxwell at chosentechgroup.com> wrote:
>     >      >
>     >      > We have a Brocade/Foundry RX-4 with (2) 24 port fiber cards
>     >      > (RX-BI-24F) and (2) 24 port copper cards (RX-BI-24C). One of
> our
>     >      > transit providers is NTT, with whom we have a single GigE
> circuit
>     >      > delivered over single mode fiber. It is a multi-km run, from
> 800 South
>     >      > Hope to One Wilshire, then on to 900 North Alameda in LA, but
> well
>     >      > within normal LX transceiver range. While we see light (neg 11
>     >      > received)  in optical monitoring, we cannot get a link to
> establish.
>     >      > No combination of auto-negotiate / manual speed settings on
> our side
>     >      > or NTT’s has been able to get a link up.
>     >
>     >      When light levels are OK but there is no link this can be
> because of
>     >      speed mismatch. Are both sides fixed on the same speed (1000 in
> this
>     >      case)?
>     >
>     >
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>
>     --
>     ================================================================
>     Aaron Wendel
>     Chief Technical Officer
>     Wholesale Internet, Inc. (AS 32097)
>     (816)550-9030
>     http://www.wholesaleinternet.com
>     ================================================================
>
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