Friday, June 24, 2011

Changing the MTU of Port-Channel Interfaces on Catalyst 6500

C6500#sh ver | in IOS|Compiled
Cisco IOS Software, s72033_rp Software (s72033_rp-ADVIPSERVICESK9_WAN-M), Version 12.2(33)SXH7, RELEASE SOFTWARE (fc3)
Compiled Thu 11-Mar-10 20:31 by prod_rel_team
C6500#
C6500#sh mod
Mod Ports Card Type                              Model              Serial No.
--- ----- -------------------------------------- ------------------ -----------
  1   48  CEF720 48 port 10/100/1000mb Ethernet  WS-X6748-GE-TX     SAL12437L89
  5    2  Supervisor Engine 720 (Active)         WS-SUP720-BASE     SAD07340058

Mod MAC addresses                       Hw    Fw           Sw           Status
--- ---------------------------------- ------ ------------ ------------ -------
  1  0023.5e08.c8b0 to 0023.5e08.c8df   3.0   12.2(18r)S1  12.2(33)SXH7 Ok
  5  000d.6535.c588 to 000d.6535.c58b   2.8   8.4(2)       12.2(33)SXH7 Ok

Mod  Sub-Module                  Model              Serial       Hw     Status
---- --------------------------- ------------------ ----------- ------- -------
  1  Centralized Forwarding Card WS-F6700-CFC       SAL12426HXD  4.1    Ok
  5  Policy Feature Card 3       WS-F6K-PFC3A       SAD074204XT  1.4    Ok
  5  MSFC3 Daughterboard         WS-SUP720          SAD071602E2  1.11   Ok

Mod  Online Diag Status
---- -------------------
  1  Pass
  5  Pass
C6500#
C6500#sh run int gi1/1
Building configuration...

Current configuration : 61 bytes
!
interface GigabitEthernet1/1
 no ip address
 shutdown
end

C6500#
C6500#sh run int gi1/2
Building configuration...

Current configuration : 61 bytes
!
interface GigabitEthernet1/2
 no ip address
 shutdown
end

C6500#
C6500#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
C6500(config)#logging event link-status default
C6500(config)#
C6500(config)#int vlan 1
C6500(config-if)#ip add 192.168.1.1 255.255.255.0
C6500(config-if)#no shut
C6500(config-if)#exit
C6500(config)#
00:21:02: %LINK-3-UPDOWN: Interface Vlan1, changed state to down
C6500(config)#
C6500(config)#int range gi1/1-2
C6500(config-if-range)#switchport
C6500(config-if-range)#switchport trunk encapsulation dot1q
C6500(config-if-range)#switchport mode trunk
C6500(config-if-range)#channel-group 1 mode on
C6500(config-if-range)#exit
C6500(config)#
C6500(config)#int po1
C6500(config-if)#switchport trunk encapsulation dot1q
C6500(config-if)#switchport mode trunk
C6500(config-if)#no shut
C6500(config-if)#end
C6500#
00:21:57: %LINK-3-UPDOWN: Interface Port-channel1, changed state to down
00:21:57: %LINK-3-UPDOWN: Interface GigabitEthernet1/1, changed state to down
00:21:57: %LINK-3-UPDOWN: Interface GigabitEthernet1/2, changed state to down
00:21:57: %LINK-SP-3-UPDOWN: Interface Port-channel1, changed state to down
00:21:57: %LINK-SP-3-UPDOWN: Interface GigabitEthernet1/1, changed state to down
00:21:57: %LINK-SP-3-UPDOWN: Interface GigabitEthernet1/2, changed state to down
00:22:04: %LINK-3-UPDOWN: Interface GigabitEthernet1/1, changed state to up
00:22:04: %LINK-3-UPDOWN: Interface GigabitEthernet1/2, changed state to up
00:22:04: %LINK-SP-3-UPDOWN: Interface GigabitEthernet1/1, changed state to up
00:22:04: %LINK-SP-3-UPDOWN: Interface GigabitEthernet1/2, changed state to up
00:22:07: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up
00:22:07: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
00:22:07: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/1, changed state to up
00:22:07: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/2, changed state to up
00:22:07: %LINK-SP-3-UPDOWN: Interface Port-channel1, changed state to up
00:22:07: %LINEPROTO-SP-5-UPDOWN: Line protocol on Interface GigabitEthernet1/1, changed state to up
00:22:07: %LINEPROTO-SP-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
00:22:07: %LINEPROTO-SP-5-UPDOWN: Line protocol on Interface GigabitEthernet1/2, changed state to up
00:22:38: %LINK-3-UPDOWN: Interface Vlan1, changed state to up
00:22:38: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
C6500#
C6500#sh int gi1/1
GigabitEthernet1/1 is up, line protocol is up (connected)
  Hardware is C6k 1000Mb 802.3, address is 0023.5e08.c8b0 (bia 0023.5e08.c8b0)
  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 00:00:53, output 00:00:08, output hang never
  Last clearing of "show interface" counters never
  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 5000 bits/sec, 9 packets/sec
     77 packets input, 13508 bytes, 0 no buffer
     Received 52 broadcasts (52 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     14448 packets output, 1043048 bytes, 0 underruns
     0 output errors, 0 collisions, 6 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
C6500#
C6500#sh int gi1/2
GigabitEthernet1/2 is up, line protocol is up (connected)
  Hardware is C6k 1000Mb 802.3, address is 0023.5e08.c8b1 (bia 0023.5e08.c8b1)
  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 00:00:56, output 00:00:09, output hang never
  Last clearing of "show interface" counters never
  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 0 bits/sec, 0 packets/sec
     23 packets input, 4812 bytes, 0 no buffer
     Received 15 broadcasts (15 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     8 packets output, 2416 bytes, 0 underruns
     0 output errors, 0 collisions, 2 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
C6500#
C6500#sh int po1
Port-channel1 is up, line protocol is up (connected)
  Hardware is EtherChannel, address is 0023.5e08.c8b1 (bia 0023.5e08.c8b0)
  MTU 1500 bytes, BW 2000000 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 unknown
  input flow-control is off, output flow-control is off
  Members in this channel: Gi1/1 Gi1/2
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  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 2000 bits/sec, 5 packets/sec
     152 packets input, 34708 bytes, 0 no buffer
     Received 125 broadcasts (124 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     25363 packets output, 1834200 bytes, 0 underruns
     0 output errors, 0 collisions, 2 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
C6500#
C6500#sh etherchannel summary
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      N - not in use, no aggregation
        f - failed to allocate aggregator

        M - not in use, no aggregation due to minimum links not met
        m - not in use, port not aggregated due to minimum links not met
        u - unsuitable for bundling
        d - default port

        w - waiting to be aggregated
Number of channel-groups in use: 1
Number of aggregators:           1

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
1      Po1(SU)          -        Gi1/1(P)       Gi1/2(P)

C6500#
C6500#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
C6500(config)#int po1
C6500(config-if)#mtu ?
  <9216-9216>  MTU size in bytes

C6500(config-if)#mtu 9216
C6500(config-if)#
00:24:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/2, changed state to down
00:24:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/1, changed state to down
00:24:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to down
00:24:45: %LINK-3-UPDOWN: Interface Port-channel1, changed state to down
00:24:45: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up
00:24:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
00:24:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/2, changed state to up
00:24:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/1, changed state to up
00:24:45: %EC-SP-5-CANNOT_BUNDLE2: Gi1/2 is not compatible with Gi1/1 and will be suspended (MTU of Gi1/2 is 9216, Gi1/1 is 1500)
00:24:45: %LINEPROTO-SP-5-UPDOWN: Line protocol on Interface GigabitEthernet1/2, changed state to down
00:24:45: %EC-SP-5-COMPATIBLE: Gi1/2 is compatible with port-channel members
00:24:45: %LINEPROTO-SP-5-UPDOWN: Line protocol on Interface GigabitEthernet1/2, changed state to up
C6500(config-if)#
C6500(config-if)#do sh run int gi1/1
Building configuration...

Current configuration : 144 bytes
!
interface GigabitEthernet1/1
 switchport
 switchport trunk encapsulation dot1q
 switchport mode trunk
 mtu 9216
 channel-group 1 mode on
end

C6500(config-if)#
C6500(config-if)#do sh run int gi1/2
Building configuration...

Current configuration : 144 bytes
!
interface GigabitEthernet1/2
 switchport
 switchport trunk encapsulation dot1q
 switchport mode trunk
 mtu 9216
 channel-group 1 mode on
end

C6500(config-if)#
C6500(config-if)#do sh run int po1
Building configuration...

Current configuration : 114 bytes
!
interface Port-channel1
 switchport
 switchport trunk encapsulation dot1q
 switchport mode trunk
 mtu 9216
end

C6500(config-if)#
C6500(config-if)#do sh int gi1/1
GigabitEthernet1/1 is up, line protocol is up (connected)
  Hardware is C6k 1000Mb 802.3, address is 0023.5e08.c8b0 (bia 0023.5e08.c8b0)
  MTU 9216 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 00:00:45, output 00:00:14, output hang never
  Last clearing of "show interface" counters never
  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 2000 bits/sec, 2 packets/sec
     82 packets input, 14556 bytes, 0 no buffer
     Received 57 broadcasts (57 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     17303 packets output, 1250996 bytes, 0 underruns
     0 output errors, 0 collisions, 6 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
C6500(config-if)#
C6500(config-if)#do sh int gi1/2
GigabitEthernet1/2 is up, line protocol is up (connected)
  Hardware is C6k 1000Mb 802.3, address is 0023.5e08.c8b1 (bia 0023.5e08.c8b1)
  MTU 9216 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 00:00:47, output 00:00:16, output hang never
  Last clearing of "show interface" counters never
  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 0 bits/sec, 0 packets/sec
     28 packets input, 5860 bytes, 0 no buffer
     Received 20 broadcasts (20 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     1016 packets output, 77368 bytes, 0 underruns
     0 output errors, 0 collisions, 2 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
C6500(config-if)#
C6500(config-if)#do sh int po1
Port-channel1 is up, line protocol is up (connected)
  Hardware is EtherChannel, address is 0023.5e08.c8b0 (bia 0023.5e08.c8b1)
  MTU 9216 bytes, BW 2000000 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 unknown
  input flow-control is off, output flow-control is off
  Members in this channel: Gi1/1 Gi1/2
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  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 4000 bits/sec, 4 packets/sec
     163 packets input, 36868 bytes, 0 no buffer
     Received 136 broadcasts (135 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     30294 packets output, 2194456 bytes, 0 underruns
     0 output errors, 0 collisions, 2 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
C6500(config-if)#

Note: Subsequent changes upon the MTU configuration does not flap the Port-Channel, even if the switch is power cycled and rebooted.

1 comment:

  1. Was this investigated by tac and is there a corresponding bug id?

    ReplyDelete