'permit ip any any' is inclusive of 'permit icmp any any'

RT1#sh cdp neighbors detail
-------------------------
Device ID: RT2
Entry address(es):
  IP address: 192.168.1.2
Platform: cisco 3620,  Capabilities: Router
Interface: FastEthernet0/0,  Port ID (outgoing port): FastEthernet0/0
Holdtime : 157 sec

Version :
Cisco Internetwork Operating System Software
IOS (tm) 3600 Software (C3620-I-M), Version 12.3(26), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by cisco Systems, Inc.
Compiled Mon 17-Mar-08 16:20 by dchih

advertisement version: 2
Duplex: full

RT1#
RT1#ping 192.168.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/28/36 ms
RT1#
================================================================================
RT2#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
RT2(config)#access-list 101 deny icmp any any
RT2(config)#access-list 101 permit ip any any
RT2(config)#int fa0/0
RT2(config-if)#ip access-group 101 in
RT2(config-if)#
================================================================================
RT1#ping 192.168.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
U.U.U
Success rate is 0 percent (0/5)
RT1#
RT1#debug ip icmp
ICMP packet debugging is on
RT1#
RT1#ping 192.168.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
U
*Mar  1 00:04:47.947: ICMP: dst (192.168.1.1) administratively prohibited unreachable rcv from 192.168.1.2.U
*Mar  1 00:04:49.979: ICMP: dst (192.168.1.1) administratively prohibited unreachable rcv from 192.168.1.2.U
Success rate is 0 percent (0/5)
RT1#
*Mar  1 00:04:51.995: ICMP: dst (192.168.1.1) administratively prohibited unreachable rcv from 192.168.1.2
RT1#
================================================================================
RT2(config-if)#do sh access-list | do sh ip access-list
Extended IP access list 101
    10 deny icmp any any (22 matches)
    20 permit ip any any
RT2(config-if)#
RT2(config-if)#no ip unreachables
RT2(config-if)#
================================================================================
RT1#ping 192.168.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
RT1#
================================================================================
RT2(config-if)#do sh access-list | do sh ip access-list
Extended IP access list 101
    10 deny icmp any any (27 matches)
    20 permit ip any any
RT2(config-if)#
RT2(config-if)#ip access-list extended 101
RT2(config-ext-nacl)#no 10
RT2(config-ext-nacl)#exit
RT2(config)#
RT2(config)#do sh access-list | do sh ip access-list
Extended IP access list 101
    20 permit ip any any
RT2(config)#
================================================================================
RT1#ping 192.168.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/22/36 ms
RT1#
*Mar  1 00:07:47.403: ICMP: echo reply rcvd, src 192.168.1.2, dst 192.168.1.1
*Mar  1 00:07:47.435: ICMP: echo reply rcvd, src 192.168.1.2, dst 192.168.1.1
*Mar  1 00:07:47.443: ICMP: echo reply rcvd, src 192.168.1.2, dst 192.168.1.1
*Mar  1 00:07:47.451: ICMP: echo reply rcvd, src 192.168.1.2, dst 192.168.1.1
*Mar  1 00:07:47.487: ICMP: echo reply rcvd, src 192.168.1.2, dst 192.168.1.1
RT1#
================================================================================
RT2(config)#do sh access-list | do sh ip access-list
Extended IP access list 101
    20 permit ip any any (15 matches)
RT2(config)#