We have several SPA gig ethernet interfaces that connect to our provider's metropolitan optical ethernet (MOE). Our interfaces connect to the provider's 3750 switch on our premises and the 3750 then connects to their MOE. If the MOE has a problem, the SPA interface goes into line-up protocol-down mode and the EIGRP neighbors go away.
The problem is when the provider fixes the MOE, the link doesn't change from up/down to up/up unless we do a shutdown/no shut on our interface. Then I notice that the SPA interfaces do not support keepalives.
ROC-RT7604A-CR#sh int g2/0/0
GigabitEthernet2/0/0 is up, line protocol is up
Hardware is GigEther SPA, address is 0017.0fac.a600 (bia 0017.0fac.a600)
Description: LLT-RT7604A G2/0/0
Internet address is 126.96.36.199/30
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 22/255, rxload 2/255
Encapsulation ARPA, loopback not set
Keepalive not supported
Full Duplex, 1000Mbps, link type is auto, media type is LX
output flow-control is unsupported, input flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 32w4d
Input queue: 0/75/20/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: Class-based queueing
Output queue: 0/40 (size/max)
30 second input rate 10617000 bits/sec, 12223 packets/sec
30 second output rate 89996000 bits/sec, 9604 packets/sec
177200803477 packets input, 17873113082287 bytes, 0 no buffer
Received 169 broadcasts (4882913 IP multicasts)
0 runts, 0 giants, 0 throttles
20 input errors, 0 CRC, 20 frame, 0 overrun, 0 ignored
0 watchdog, 6411301 multicast, 0 pause input
20252772537 packets output, 8978256614446 bytes, 0 underruns
0 output errors, 0 collisions, 4 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
Is that why the interface doesn't transition to up/up when the MOE is fixed because there is no keepalive being generated.
Or is there something else I need to look at to find out why the interface will not automatically come back up?
Remember, we never lose the connection between our SPA interface and the provider's 3750. It is only in the MOE that the connection is lost causing EIGRP to time out and the interface to go UP/DOWN.