On 26-06-2017 14:53, Will Hargrave wrote:
On 26 Jun 2017, at 13:08, Giles Coochey wrote:
But interface counters show only some packets going out, and only
CRCs coming in?
If we loop a Catalyst copper port VLAN between the NTU and the ASR
everything comes up and works fine.
Did you set `speed 100` on the interface on the ASR?
We've set it to auto, and the interface does come up,up - but we get
CRCs as described.
BT have told us their side is set to auto, and the interface doesn't
come up if we hardcode the speed.
My punt is that it’s coming up at 100M half duplex at your end due to
autoneg failure. Did you check that?
On many platforms turning off autoneg turns off auto-mdix, which might
result in the link not coming up if it were two routers connected with
a straight-through cable. Try using a crossover cable and hard set the
speed to 100/full. There are probably some asr1k commands to show the
actual autoneg status, which would be instructive to find out what the
actual interface settings are at the other end.
Will
With auto-neg on it comes up at 100Mbps full-duplex.
Interface does not come up at all unless auto-neg is on.
I have tried both a cross-over and a straight through cable, we get the
same results with both (so I believe MDIX is actually working just
fine).
We will try the SFP-GE-T, once we have been able to source one.
