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speed negotiation settings for a 10G interface

tejasAtluri
Level 1
Level 1

HI,

We have the following setup:

2 ports of CISCO 6509(also has xfp long range)  switch connected to 2(XAUI) ports of SPARC box T5220.

When the SPARC box goes for a reboot, the link is UP at XAUI while ports are down at CISCO end.

However either of the following brings the link up.

. shut/no shut at 6509 or

. unplug and replug the cable.

No speed negotiation is configured at XAUI.

I would like to know if 10G CISCO 6509  by default has autonegotiation on?

From the document "Configuring and Troubleshooting Ethernet 10/100/1000Mb Half/Full Duplex Auto-Negotiation"

I found the following line

"By default, all devices are supposed to perform autonegotiation. 802.3z       does not specifically define a way to turn Autonegotiation off, for both       1GigabitEthernet and 10GigabitEthernet."

Im seeing the following situation:

"Assume that there are two devices, A and B. Assume that each device can       have Autonegotiation enabled, or disabled. The correct behaviour of link status       with autonegotiation in accordance to the IEEE Std 802.3z-1998 should be like       this:

  • If A is disabled and B is enabled, then A should report link up and B           should report link down."

Does it apply to 10 G inetrfaces also?

PFB the config output of CISCO 6509

Cisco IOS Software, s72033_rp Software (s72033_rp-IPBASEK9-M), Version 12.2(33)SXI5, RELEASE SOFTWARE (fc2)

cisco WS-C6509-E (R7000) processor (revision 1.5) with 983008K/65536K bytes of memory.

6  16  CEF720 16 port 10GE WS-X6716-10GE

6  Distributed Forwarding Card WS-F6700-DFC3C

interface TenGigabitEthernet1/6/16

description BKUP:SSCPRODENG-NXGE4

switchport

switchport access vlan 101

switchport mode access

spanning-tree portfast edge

end

NOLACORE#sh int te1/6/16

TenGigabitEthernet1/6/16 is up, line protocol is up (connected)

  Hardware is C6k 10000Mb 802.3, address is f866.f220.5027 (bia f866.f220.5027)

  Description: BKUP:SSCPRODENG-NXGE4

  MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec,

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

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 10Gb/s, media type is 10Gbase-LRM

  input flow-control is on, output flow-control is off

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input never, output 00:00:19, output hang never

  Last clearing of "show interface" counters 7w4d

  Input queue: 0/2000/0/0 (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 81000 bits/sec, 7 packets/sec

     207547040601 packets input, 34173665463903 bytes, 0 no buffer

     Received 64391 broadcasts (0 multicasts)

     0 runts, 0 giants, 0 throttles

     36 input errors, 36 CRC, 66 frame, 0 overrun, 0 ignored

     0 watchdog, 0 multicast, 0 pause input

     0 input packets with dribble condition detected

     380437679022 packets output, 276421252994669 bytes, 0 underruns

     0 output errors, 0 collisions, 1 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

From the above config output can we say that 10Gb/s speed is forced on the link?

Regards,

Tejaswi A.

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