Ran into two nice commands one can use when wanting to see the fine details of packets going in/out your switch. Note I used this on a Nexus 5548
# show queuing interface e1/23
!what i liked about this command is it shows you that 0 packets have been discarded on ingress so packet-wise we look OK!
Ethernet1/23 queuing information:
TX Queuing
qos-group sched-type oper-bandwidth
0 WRR 100
RX Queuing
qos-group 0
q-size: 470080, HW MTU: 1500 (1500 configured)
drop-type: drop, xon: 0, xoff: 2938
Statistics:
Pkts received over the port : 92217606
Ucast pkts sent to the cross-bar : 58330201
Mcast pkts sent to the cross-bar : 362977
Ucast pkts received from the cross-bar : 37427746
Pkts sent to the port : 37620410
Pkts discarded on ingress : 0
Per-priority-pause status : Rx (Inactive), Tx (Inactive)
Total Multicast crossbar statistics:
Mcast pkts received from the cross-bar : 192677
#show hardware internal carmel port ethernet 1/23
!what i liked about this command is it shows you tx/rx sizes in ranges and its helpful when messing with MTU sizes.
TX_PKT_SIZE_LT_64 | 0
TX_PKT_SIZE_IS_64 | 10738894
TX_PKT_SIZE_IS_65_TO_127 | 18520305078
TX_PKT_SIZE_IS_128_TO_255 | 30824980169
TX_PKT_SIZE_IS_256_TO_511 | 8819349980
TX_PKT_SIZE_IS_512_TO_1023 | 14790096853
TX_PKT_SIZE_IS_1024_TO_1518 | 1090322944
TX_PKT_SIZE_IS_1519_TO_2047 | 4159319352
TX_PKT_SIZE_IS_2048_TO_4095 | 0
TX_PKT_SIZE_IS_4095_TO_8191 | 0
TX_PKT_SIZE_IS_8192_TO_9216 | 0
TX_PKT_SIZE_GT_9216 | 0
TX_PKT_TOTAL | 13790603830
TX_PKT_OCTETS | 1850143324137
TX_PKT_GOOD | 13790603819
TX_PKT_UCAST | 13305173220
TX_PKT_MCAST | 128859627
TX_PKT_BCAST | 356570962
TX_PKT_VLAN | 13783659146
TX_PKT_802.3x_PAUSE | 0
TX_PKT_PER_PRIORITY_PAUSE | 0
TX_PKT_FRAME_ERROR | 11
RX_PKT_SIZE_LT_64 | 0
RX_PKT_SIZE_IS_64 | 24776668548
RX_PKT_SIZE_IS_65_TO_127 | 23486170686
RX_PKT_SIZE_IS_128_TO_255 | 44084427696
RX_PKT_SIZE_IS_256_TO_511 | 5569196738
RX_PKT_SIZE_IS_512_TO_1023 | 10288874151
RX_PKT_SIZE_IS_1024_TO_1518 | 2326070474
RX_PKT_SIZE_IS_1519_TO_2047 | 665975839
RX_PKT_SIZE_IS_2048_TO_4095 | 0
RX_PKT_SIZE_IS_4095_TO_8191 | 0
RX_PKT_SIZE_IS_8192_TO_9216 | 0
RX_PKT_SIZE_GT_9216 | 0
Hope this helps someone out there!
William Zambrano
NYC networkers is run by William Zambrano, a passionate network engineer who has been in the IT industry for eight years who posts up blog articles, YouTube videos, and holds meetup.com events in the NYC area. He lives in Queens, New York and has consulted in various different companies in the NY area. Previously William worked as a Cisco Certified Systems Instructor (CCSI) but now currently works for Arista Networks serving as a Systems Engineer. William can be reached by email at willzambrano@gmail.com
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