WS-C4503-NOC#ping 2001:4248:FFFF:1::11

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:4248:FFFF:1::11, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/11/20 ms
WS-C4503-NOC#ping ipv6.google.com
Translating "ipv6.google.com"...domain server (8.8.8.8) [OK]

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2A00:1450:400C:C07::71, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
WS-C4503-NOC#traceroute ipv6.google.com

Type escape sequence to abort.
Tracing the route to ipv6.l.google.com (2A00:1450:400C:C07::71)

  1 2001:4248:FFFF:1::11 4 msec 4 msec 20 msec
  2 2001:4248:0:7::2 0 msec 4 msec 0 msec
  3 2001:978:2:22::1C:1 204 msec 208 msec 204 msec
  4 2001:550:0:1000::9A36:3C91 204 msec
    2001:550:0:1000::9A36:3C95 204 msec *
  5 2001:550:0:1000::8275:3159 204 msec 208 msec 204 msec
  6  *  *  *
  7  *  *  *
  8  *  *  *
  9  *  *  *
 10  *  *  *
 11  *  *  *
 12  *  *  *
 13  *  *  *
 14  *  *