I've hit this 

CSCva35619 so that matches up. Upgraded at the time to 03.16.04a extended 
support release. Worked perfectly! Forwarding correctly ever since 


Sent from my portable email sender
Please excuse shorter messages

> On 19/05/2017, at 21:09, Paul Sherratt <li...@paul.sh> wrote:
> 
> Hi John,
> 
> This sounds like it may be an input queue wedge on the interface, which is
> only fixed with a reload.
> 
> I've seen CVE-2016-1478 / CSCva35619 hit a few people.  If you're running
> an affected version you'll need to upgrade or workaround.  To verify, check
> queue size in "show interface" output - if it's a queue wedge you can issue
> "show buffers old [dump]" to confirm it is indeed the NTP bug causing your
> issues.
> 
> https://bst.cloudapps.cisco.com/bugsearch/bug/CSCva35619
> 
> 
> Cheers,
> 
> Paul
> 
>> On 19 May 2017 at 05:43, John Osmon <jos...@rigozsaurus.com> wrote:
>> 
>> I've never found an IOS device I couldn't tame with the help of Usenet
>> and then google.  However, I'm new to the ASR1000 and IOS-XE, and I'm
>> running into something I've never seen before.
>> 
>> I've got GigE ports that will pass traffic, and then suddenly stop.
>> The interface still shows up/up, but you can't even ping the local
>> interface from the router itself.
>> 
>> We've can restore traffic by moving the config to another port, but the
>> "dead" port stays dead.  We've tried shut/no shut, new SFPs, and new
>> configs -- but the port still won't work.
>> 
>> Interestingly, the port *DOES* work with IPv6 -- but not IPv4.  This
>> router doesn't use IPv6, but when I put an address on the interface, it
>> is pingable.
>> 
>> If you apply an IPv4 /24 to the dead interface, the routing table shows
>> the /24 as a "connected" network, and shows a "local" /32 for the
>> address in use -- but is not pingable.
>> 
>> The only thing we've found in common between the ports is that they
>> were connected to eBGP peers.  We've had three events, on ports
>> connected to two different providers.
>> 
>> My next step is to get to the colo and move one of the "dead" ports to
>> a spanned port switch and start sniffing the line.
>> 
>> Any suggestions would be appreciated.  Hardware in use includes:
>>   ASR1000-ESP10
>>   ASR1002-RP1
>>   SPA-8X1GE-V2
>> 
>> Problem has occurred in both built-in and SPA-8X1GE-V2 ports, with
>> multi-mode, and GE-T transceivers.
>> 
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