I'm trying to connect a MX5 router with a 3750 with a layer 3 VLAN using a copper SFP on the MX5. The ports come up fine on Layer1, but the 3750 is showing that all incoming packets are errors/runts:
Cisco:
3750#show int gi1/0/3
GigabitEthernet1/0/3 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0016.c85b.c483 (bia 0016.c85b.c483)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 832 bytes, 0 no buffer
Received 0 broadcasts (0 multicasts)
17 runts, 0 giants, 0 throttles
17 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
109 packets output, 6976 bytes, 0 underruns
0 output errors, 0 collisions, 6 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
Juniper:
R1# run show interfaces ge-1/1/8
Physical interface: ge-1/1/8, Enabled, Physical link is Down
Interface index: 158, SNMP ifIndex: 534
Link-level type: Ethernet, MTU: 1518, Speed: 1000mbps, BPDU Error: None, MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled, Flow control: Enabled, Auto-negotiation: Enabled,
Remote fault: Online
Device flags : Present Running Down
Interface flags: Hardware-Down SNMP-Traps Internal: 0x0
CoS queues : 8 supported, 8 maximum usable queues
Current address: 5c:5e:ab:d6:dc:80, Hardware address: 5c:5e:ab:d6:dc:80
Last flapped : 2012-06-12 09:28:54 EDT (00:00:12 ago)
Input rate : 0 bps (0 pps)
Output rate : 0 bps (0 pps)
Active alarms : LINK
Active defects : LINK
Interface transmit statistics: Disabled
Logical interface ge-1/1/8.0 (Index 335) (SNMP ifIndex 542)
Flags: Device-Down SNMP-Traps 0x0 VLAN-Tag [ 0x8100.649 ] Encapsulation: ENET2
Input packets : 0
Output packets: 17
Protocol inet, MTU: 1500
Flags: Sendbcast-pkt-to-re
Addresses, Flags: Dest-route-down Is-Preferred Is-Primary
Destination: 10.64.9/24, Local: 10.64.9.2, Broadcast: 10.64.9.255
Protocol multiservice, MTU: Unlimited
Logical interface ge-1/1/8.32767 (Index 336) (SNMP ifIndex 543)
Flags: Device-Down SNMP-Traps 0x0 VLAN-Tag [ 0x0000.0 ] Encapsulation: ENET2
Input packets : 0
Output packets: 0
Protocol multiservice, MTU: Unlimited
Flags: None
It's outputting packets to the MX5, but the MX5 doesn't see any input packets. I did some research and found that runts generally have something to do with a duplex mismatch or a link being half-duplex. I've tried manually setting the speed and duplex on both devices, as well as trying to turn off/on auto-negotiation to no avail. Does anyone know why this is happening? Below are the port configs for both:
interface GigabitEthernet1/0/3
switchport access vlan 649
switchport mode access
no cdp enable
interface Vlan649
ip address 10.64.9.1 255.255.255.0
no ip proxy-arp
R1# show interfaces ge-1/1/8
vlan-tagging;
unit 0 {
vlan-id 649;
family inet {
address 10.64.9.2/24;
}
}
