05-09-2012 04:12 AM - edited 03-07-2019 06:36 AM
I am using a switch(3560X) and a router 7606 for the given setup.
I am doing a simple simulation of attcaching a port (on 7606 router)to the switch and testing it with various speed ,duplex setting.
The switch port is in vlan 2 with ip address x.x.x.234 mask 255.255.255.0
and the attached router port has ip address x.x.x.235 mask 255.255.255.0
The problem is:
The connection is establises for duplex full,speed 1000
but it does not establish for duplex full,speed 100
and duplex half,speed 10.
The ports are 10/100/1000 Ethernet ports.
The output from 3560 is:
3560X#sh int gig 0/10
GigabitEthernet0/10 is down, line protocol is down (notconnect)
Hardware is Gigabit Ethernet, address is 442b.0389.448a (bia 442b.0389.448a)
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)
Half-duplex, 10Mb/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 00:35:39, output 00:35:09, 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)
3560X#sh run int gig 0/10
Current configuration : 129 bytes
!
interface GigabitEthernet0/10
switchport access vlan 2
switchport mode access
speed 10
duplex half
end
################################################ #######################################
3560X#sh int gig 0/10
GigabitEthernet0/10 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 442b.0389.448a (bia 442b.0389.448a)
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 00:00:03, output 00:00:01, 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)
3560X#sh run int gig 0/10
Current configuration : 131 bytes
!
interface GigabitEthernet0/10
switchport access vlan 2
switchport mode access
speed 1000
duplex full
end
And Output from the 7606 link is :
7606-A#sh run int gig 2/10
!
interface GigabitEthernet2/10
ip address 192.168.0.235 255.255.255.0
speed 10
duplex half
end
7606-A#sh int gig 2/10
GigabitEthernet2/10 is down, line protocol is down (notconnect)
Hardware is C6k 1000Mb 802.3, address is 0011.bbb1.a140 (bia 0011.bbb1.a140)
Internet address is 192.168.0.235/24
MTU 1500 bytes, BW 10000 Kbit, DLY 10 usec,
reliability 255/255, txload 0/255, rxload 0/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 10Mb/s, media type is 10/100/1000BaseT
input flow-control is off, output flow-control is off
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:25:11, output 00:25:10, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/59/0 (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
L2 Switched: ucast: 1619 pkt, 103616 bytes - mcast: 4238 pkt, 311393 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
##########################################################################################
7606-A#sh run int gig 2/10
Current configuration : 102 bytes
!
interface GigabitEthernet2/10
ip address 192.168.0.235 255.255.255.0
speed 1000
duplex full
end
7606-A#sh int gig 2/10
GigabitEthernet2/10 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 0011.bbb1.a140 (bia 0011.bbb1.a140)
Internet address is 192.168.0.235/24
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 10/100/1000BaseT
input flow-control is off, output flow-control is off
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:37, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/59/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 1000 bits/sec, 1 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
L2 Switched: ucast: 1656 pkt, 105984 bytes - mcast: 4679 pkt, 342779 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
Thanks
Girish
Solved! Go to Solution.
05-09-2012 04:54 AM
Thats because you are not using a crossover cable most likely . If you are using a straight thru cable the link will only come up if the port settings are set for auto/auto because the mdix feature will only work if the ports are auto. Generally leave gig ports as auto . I bet if you change the 3560 side to auto the link will come up . You can set the 3560 side as auto and restrict the speed to 100 if you want . USe the "speed auto 100" or speed auto 10" commands.
05-09-2012 04:54 AM
Thats because you are not using a crossover cable most likely . If you are using a straight thru cable the link will only come up if the port settings are set for auto/auto because the mdix feature will only work if the ports are auto. Generally leave gig ports as auto . I bet if you change the 3560 side to auto the link will come up . You can set the 3560 side as auto and restrict the speed to 100 if you want . USe the "speed auto 100" or speed auto 10" commands.
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