I noticed that on my new Cisco 2921 routers with IOS IOS 15.4.1T2(ED) and 15.4.3.(M1), BFD commands were removed. I had it to downgrade to 15.2.4(M5). Does anyone knows why Cisco removed them?
NEW_TXDLLSCENTR2007(config-if)#interface GigabitEthernet0/1.50
NEW_TXDLLSCENTR2007(config-subif)# encapsulation dot1Q 50
NEW_TXDLLSCENTR2007(config-subif)# ip address x.x.x.x 255.255.255.252
NEW_TXDLLSCENTR2007(config-subif)# ip flow ingress
NEW_TXDLLSCENTR2007(config-subif)# ip flow egress
NEW_TXDLLSCENTR2007(config-subif)# bfd interval 999 min_rx 999 multiplier 3
^
% Invalid input detected at '^' marker.
NEW_TXDLLSCENTR2007(config-subif)#
NEW_TXDLLSCENTR2007(config-router)#interface GigabitEthernet0/1
NEW_TXDLLSCENTR2007(config-if)#bfd interval 999 min_rx 999 multiplier 3
^
% Invalid input detected at '^' marker.
NEW_TXDLLSCENTR2007(config-if)#interface GigabitEthernet0/1.50
NEW_TXDLLSCENTR2007(config-subif)#bfd interval 999 min_rx 999 multiplier 3
^
% Invalid input detected at '^' marker.
NEW_TXDLLSCENTR2007(config-subif)#?
Interface configuration commands:
aaa Authentication, Authorization and Accounting.
arp Set arp type (arpa, probe, snap), timeout, log options or
packet priority
backup Modify backup parameters
bandwidth Set bandwidth informational parameter
bgp-policy Apply policy propagated by bgp community string
NEW_TXDLLSCENTR2007(config-subif)#end
NEW_TXDLLSCENTR2007#
NEW_TXDLLSCENTR2007#sh b?
backhaul-session-manager backup banner bcm560x
beep bgp bridge buffers
bulkstat
NEW_TXDLLSCENTR2007#
NEW_TXDLLSCENTR2007#sh ver
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.4(1)T2, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Wed 30-Jul-14 09:14 by prod_rel_team
ROM: System Bootstrap, Version 15.0(1r)M16, RELEASE SOFTWARE (fc1)
NEW_TXDLLSCENTR2007 uptime is 3 days, 18 hours, 8 minutes
System returned to ROM by reload at 22:57:47 UTC Thu Dec 18 2014
System image file is "flash0:c2900-universalk9-mz.SPA.154-1.T2.bin" <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Last reload type: Normal Reload
Last reload reason: Reload Command
Cisco CISCO2921/K9 (revision 1.0) with 487424K/36864K bytes of memory.
Processor board ID FTX1849AK5T
3 Gigabit Ethernet interfaces
1 terminal line
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
255488K bytes of ATA System CompactFlash 0 (Read/Write)
License Info:
License UDI:
-------------------------------------------------
Device# PID SN
-------------------------------------------------
*1 CISCO2921/K9 FTX......
Technology Package License Information for Module:'c2900'
------------------------------------------------------------------------
Technology Technology-package Technology-package
Current Type Next reboot
------------------------------------------------------------------------
ipbase ipbasek9 Permanent ipbasek9
security None None None
uc None None None
data None None None
NtwkEss None None None
CollabPro None None None
Configuration register is 0x2102
<<<<<<<<<<<<<< AFTER DOWNGRADING THE IOS >>>>>>>>>>>>>>>>>
NEW_TXDLLSCENTR2007#sh ver
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.2(4)M5, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2013 by Cisco Systems, Inc.
Compiled Fri 13-Sep-13 14:59 by prod_rel_team
ROM: System Bootstrap, Version 15.0(1r)M16, RELEASE SOFTWARE (fc1)
NEW_TXDLLSCENTR2007 uptime is 23 minutes
System returned to ROM by reload at 19:40:14 GMT Mon Dec 22 2014
System image file is "flash:c2900-universalk9-mz.SPA.152-4.M5.bin" <<<<<<<<<<<<<<<<<
NEW_TXDLLSCENTR2007#conf t
Enter configuration commands, one per line. End with CNTL/Z.
NEW_TXDLLSCENTR2007(config)#interface GigabitEthernet0/1.50
NEW_TXDLLSCENTR2007(config-subif)# bfd interval 999 min_rx 999 multiplier 3 <<<<<<<<<<<<<<<<<<<<<<<<<<<
NEW_TXDLLSCENTR2007(config-subif)#end
NEW_TXDLLSCENTR2007#
