[j-nsp] GRE Between Juniper and Cisco

[Ranjit Bahad]

Hi,

 

I have a link services pic installed in a M10 and have configured a GRE
tunnel from this box to a Cisco router.

 

Below are the configs:

 

Juniper:

 

   gr-1/0/0 {

        unit 10 {

            tunnel {

                source 172.30.9.2;

                destination 172.30.12.2;

            }

            family inet {

                mtu 1514;

                address 1.1.1.1/24;

            }

        }

    }

 

show interfaces gr-1/0/0

Physical interface: gr-1/0/0, Enabled, Physical link is Up

  Interface index: 147, SNMP ifIndex: 69

  Type: GRE, Link-level type: GRE, MTU: Unlimited, Speed: 800mbps

  Device flags   : Present Running

  Interface flags: Point-To-Point SNMP-Traps

  Input rate     : 0 bps (0 pps)

  Output rate    : 0 bps (0 pps)

 

  Logical interface gr-1/0/0.10 (Index 105) (SNMP ifIndex 86)

    Flags: Point-To-Point SNMP-Traps 16384

    IP-Header 172.30.12.2:172.30.9.2:47:df:64:0000000000000000
Encapsulation: GRE-NULL

  Input packets : 26

  Output packets: 29

    Protocol inet, MTU: 1514

      Flags: User-MTU

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 1.1.1/24, Local: 1.1.1.1, Broadcast: 1.1.1.255

 

Cisco:

 

sh int tunnel 10

Tunnel10 is up, line protocol is up

  Hardware is Tunnel

  Internet address is 1.1.1.2/24

  MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation TUNNEL, loopback not set

  Keepalive not set

  Tunnel source 172.30.12.2, destination 172.30.9.2, fastswitch TTL 255

  Tunnel protocol/transport GRE/IP, key disabled, sequencing disabled

  Tunnel TTL 255

  Checksumming of packets disabled, fast tunneling enabled

  Last input 00:09:41, output 00:05:06, 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: 0/0 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

  L2 Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes

  L3 in Switched: ucast: 0 pkt, 0 bytes - mcast: 0 pkt, 0 bytes mcast

  L3 out Switched: ucast: 0 pkt, 0 bytes mcast: 0 pkt, 0 bytes

     3 packets input, 888 bytes, 0 no buffer

     Received 0 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

     36 packets output, 4012 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     0 output buffer failures, 0 output buffers swapped out

AMCORRTR02#

AMCORRTR02#

AMCORRTR02#sh run int tun

AMCORRTR02#sh run int tunnel 10

Building configuration...

 

Current configuration : 118 bytes

!

interface Tunnel10

 ip address 1.1.1.2 255.255.255.0

 tunnel source 172.30.12.2

 tunnel destination 172.30.9.2

end

 

Neither end of the tunnel can ping each other. Pinging the physical IP's
of each host router is ok. Any help will be greatly appreciated!

 

Thanks,

 

Raj.


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