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Default delay value on Cisco interfaces

Jose Solano
Level 4
Level 4

I was wondering what is the default delay value for 1gig, fastethernet and 10 gig interfaces, this because I've seen that normally on a 1gig interface the delay is 10 usec, however if you change the speed to 100 MB/s the delay still remains the same. Is there any defalut setting somewhere? I´ve been looking every where but haven´t found anything on this.

5 Replies 5

Reza Sharifi
Hall of Fame
Hall of Fame

Default for a gig is 100

sw1#sh interfaces gigabitEthernet 1/0/1

GigabitEthernet1/0/1 is up, line protocol is up (connected)

  Hardware is Gigabit Ethernet, address is 001b.5400.3381 (bia 001b.5400.3381)

  MTU 9198 bytes, BW 100000 Kbit, DLY 100 usec,

for 10Gig is 10

sw1#sh interfaces te1/0/1             

TenGigabitEthernet1/0/1 is down, line protocol is down (notconnect)

  Hardware is not present

  Hardware is Ten Gigabit Ethernet, address is 001b.5400.33b5 (bia 001b.5400.33b5)

  MTU 9198 bytes, BW 10000000 Kbit, DLY 10 usec,            


Hi thanks for the response, now I have a question look at this config:

interface GigabitEthernet1/11


speed 1000

duplex full


#sh int gi 1/1 | i DLY

  MTU 1500 bytes, BW 100000 Kbit, DLY 10 usec

interface GigabitEthernet1/1

speed 100

duplex full

channel-protocol pagp

channel-group 1 mode desirable


3#sh int gi 1/11 | i DLY

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec

Why if I have a gig1/1 hardcoded at speed 100 shows 10 sec delay?

And also if the interface g1/11 is at 1000 why shows 10 usec delay?

I´ve seen more of the gig interfaces with a 10 usec delay...

I don't think changing the interface speed manually changes the delay.  It appears it still keeps the default, which is 10 in your case.  It may also be that each platform in different with mine gig is 100 and 10gig is 10.  My output is from a 3750-E. 



This output is from a 6506-E.

Hello Jose,

Check this support forum, it might help you:

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