here is the interface:
r1#
r1#
r1#show interface ser1 full
r1#show interface ser1 full
serial1 is up (since 00:00:01, 1 changes)
 description:
 type is serial, hwaddr=none, mtu=1492, bw=2000kbps, vrf=v1
 ip4 address=1.1.1.1/24, netmask=255.255.255.0, ifcid=10011
 ip6 address=1234::1/16, netmask=ffff::, ifcid=10011
 received 23 packets (2310 bytes) dropped 0 packets (0 bytes)
 transmitted 23 packets (2310 bytes) promisc=false
 |~~~~~~~|~~~~~~|~~~~~~~~~|~~~~~~|~~~~~~|~~~~~~~~~|~~~~~~|
 | time  | send | receive | drop | send | receive | drop |
 |-------|------|---------|------|------|---------|------|
 | 1sec  | 2310 | 2310    | 0    | 23   | 23      | 0    |
 | 1min  | 0    | 0       | 0    | 0    | 0       | 0    |
 | 1hour | 0    | 0       | 0    | 0    | 0       | 0    |
 |_______|______|_________|______|______|_________|______|
 |~~~~~~~~|~~~~~~~|~~~~~~~~~|~~~~~~|~~~~~~|~~~~~~|
 | type   | value | handler | tx   | rx   | drop |
 |--------|-------|---------|------|------|------|
 | ethtyp | 0800  | ip4     | 940  | 940  | 0    |
 | ethtyp | 86dd  | ip6     | 1370 | 1370 | 0    |
 |________|_______|_________|______|______|______|
         36k|
         33k|#
         29k|#
         25k|#
         22k|#
         18k|#
         14k|#
         11k|#
        7392|#
        3696|#
           0|#
         bps|0---------10--------20--------30--------40--------50-------- seconds
          46|
          41|#
          36|#
          32|#
          27|#
          23|#
          18|#
          13|#
           9|#
           4|#
           0|#
         pps|0---------10--------20--------30--------40--------50-------- seconds
r1#
r1#