[j-nsp] Interface without 'family ethernet-switching' possible on EX series?

James Jun james at towardex.com
Fri Jun 27 13:26:04 EDT 2008


I'm trying to setup a plain routed IP port (in other words, the interface is
not a switching port (i.e. 'no switchport' command for Cisco catalyst
switches)) connection between an EX3200-24T device and a Cisco Cat6500
device.  Both sides see the interface up/up and I can even see the MAC
address of remote sides in arp table, but attempting to ping the Cisco from
the Juniper EX shows "sendto: Network is down"

Any ideas?  Are you not allowed to use 'family inet' on a built-in copper
gig-e port for EX series? Do you have to always use 'family
ethernet-switching' and configure IP addresses on a vlan logical interface?

Thanks in advance,

Configuration on EX:

admin at ex3200# edit interfaces ge-0/0/0 
[edit interfaces ge-0/0/0]
admin at ex3200# show 
mtu 9000;
ether-options {
unit 0 {
    description "link to dist-2.sbo";     
    family inet {
[edit interfaces ge-0/0/0]
admin at ex3200#

Physical interface: ge-0/0/0, Enabled, Physical link is Up
  Interface index: 129, SNMP ifIndex: 21
  Link-level type: Ethernet, MTU: 9000, Speed: Auto, Loopback: Disabled,
Source filtering: Disabled,
  Flow control: Disabled, Auto-negotiation: Enabled, Remote fault: Online
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x0
  Link flags     : None
  CoS queues     : 8 supported, 8 maximum usable queues
  Current address: 00:1f:12:30:b0:41, Hardware address: 00:1f:12:30:b0:41
  Last flapped   : 2008-03-07 17:22:26 GMT-5 (00:16:11 ago)
  Input rate     : 0 bps (0 pps)
  Output rate    : 0 bps (0 pps)
  Active alarms  : None
  Active defects : None

Configuration on Cisco:

dist-2.sbo#sh run in g1/2 
Building configuration...
Current configuration : 199 bytes
interface GigabitEthernet1/2
 description Link to ex3200-1
 mtu 9000
 ip address 
 no ip redirects
 ip ospf cost 10005
 flowcontrol send off

GigabitEthernet1/2 is up, line protocol is up (connected)
  Hardware is C6k 1000Mb 802.3, address is 0015.c722.1b80 (bia
  Description: Link to ex3200-1
  Internet address is
  MTU 9000 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 T
  input flow-control is off, output flow-control is off
  Clock mode is auto

admin at ex3200> ping    
PING ( 56 data bytes
ping: sendto: Network is down
ping: sendto: Network is down
ping: sendto: Network is down
ping: sendto: Network is down
ping: sendto: Network is down
--- ping statistics ---
5 packets transmitted, 0 packets received, 100% packet loss

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