Bugs for Cisco IOS Release 15.6(1)T
Open and Resolved Bugs
- Using the Bug Search Tool
Open Bugs—Cisco IOS Release 15.6(1)T2
Open Bugs—Cisco IOS Release 15.6(1)T1
Open Bugs—Cisco IOS Release 15.6(1)T
Resolved Bugs—Cisco IOS Release 15.6(1)T2
Resolved Bugs—Cisco IOS Release 15.6(1)T1
Resolved Bugs—Cisco IOS Release 15.6(1)T

Bugs for Cisco IOS Release 15.6(1)T

Open and Resolved Bugs

The open and resolved bugs for this release are accessible through the Cisco Bug Search Tool . This web-based tool provides you with access to the Cisco bug tracking system, which maintains information about bugs and vulnerabilities in this product and other Cisco hardware and software products.

Within the Cisco Bug Search Tool, each bug is given a unique identifier (ID) with a pattern of CSCxxNNNNN, where x is any letter (a-z) and N is any number (0-9). The bug IDs are frequently referenced in Cisco documentation, such as Security Advisories, Field Notices and other Cisco support documents. Technical Assistance Center (TAC) engineers or other Cisco staff can also provide you with the ID for a specific bug.

You can save searches that you perform frequently. You can also bookmark the URL for a search and email the URL for those search results

Note

If the defect that you have requested cannot be displayed, this may be due to one or more of the following reasons: the defect number does not exist, the defect does not have a customer-visible description yet, or the defect has been marked Cisco Confidential.

This document contains the following sections:

Using the Bug Search Tool

The Cisco Bug Search Tool enables you to filter the bugs so that you only see those in which you are interested. In addition to being able to search for a specific bug ID, or for all bugs in a product and release, you can filter the open and/or resolved bugs by one or more of the following criteria:

Last modified date
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For more information about how to use the Cisco Bug Search Tool, including how to set email alerts for bugs and to save bugs and searches, see Bug Search Tool Help & FAQ.

Note

You must have a Cisco.com account to log in and access the Cisco Bug Search Tool. if you do not have one, you can register for an account.

To use the Cisco Bug Search Tool:

In your browser, navigate to the Cisco Bug Search Tool.
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To search for a specific bug, enter the bug ID in the Search For field and press Enter.
To search for bugs related to a specific software release, do the following:
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2. In the Releases field, enter the release for which you want to see bugs.

The Cisco Bug Search Tool displays a preview of the results of your search below your search criteria. You can mouse over bugs to see more content about a specific bug.

To see more content about a specific bug, you can do the following:

Mouse over a bug in the preview to display a pop-up with more information about that bug.
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Your search results update when you choose a filter.

Open Bugs—Cisco IOS Release 15.6(1)T2

Table 1. Open Bugs—Cisco IOS Release 15.6(1)T2
Identifier	Description
CSCuz96879	tunnel stops passing traffic after FO with ISM and Stateful HA
CSCux41072	EIGRP sending hello messages with interface in passive mode.
CSCuz98690	IWAN auto-tunnel - incomplete adjacencies
CSCuz70409	HWIC-4ESW randomly stops forwarding multicast streams.
CSCuz69459	HWIC-4T with hardware reversion have ping loss.
CSCuz86736	ISR3925 // SM-X-1-T3/E3= // Flapping Issue while XR on far end device
CSCuz39721	ASR1K/RP2/SW 15.4(3)S4 crash
CSCuv18439	CPUHOGS in chunk corruption crashinfos distracts troubleshooting
CSCva22819	Processor pool leak due to CCSIP_SPI_CONTROL
CSCuu49038	Base Station Ping fails from the router
CSCuy93968	Link Recovery not working

Open Bugs—Cisco IOS Release 15.6(1)T1

Table 2. Open Bugs—Cisco IOS Release 15.6(1)T1
Identifier	Description
CSCuy33802	Crash after the CWMP config download
CSCux47834	DHCP server crashed when updating DDNS entries
CSCuy29071	stacklow crash while configuring mDNS
CSCux68976	Crash in fib_fib_get_fib_tableid
CSCuy33991	Router crash after tunnel interface goes up and BGP adjacency is set up
CSCuo70505	ZBFW: Crash@fw_tcp_cleanup_ooo_q after sending heavy traffic
CSCuw75695	Router crash due to Process = SSS Manager
CSCuv86229	Interrupt stack overrun and crash due to recursive tunnel lookup, Part 2
CSCux99007	crash at hqf_centralized_pak_dequeue
CSCuu98027	onepk memory corrupt crash when repeating sh policy-map
CSCux07723	Router crash when ISP removes the patch cords connected to Gig 0/2
CSCuy34361	SSH V1 periodically crashes when displaying large volumes of data
CSCuy00161	DSP crashed when dialing the masked # of

Open Bugs—Cisco IOS Release 15.6(1)T

Table 3. Open Bugs—Cisco IOS Release 15.6(1)T
Identifier	Description
CSCuw84614	CUBE SP match-address ^.* regex causes Router CLI to hang
CSCuu46659	Display warning before saving config that can trigger routing flap
CSCuw64684	Packet loss observed during oversubscription of QOS in c5921
CSCuw55129	vlan tag removed kernel-2.6.32-504.23.4.el6.i686 and later
CSCuw25009	call-home msg triggered by DS isn't sent out
CSCuv96688	Unexpected call-home msg truncate log
CSCux03010	Longest Idle voice hunt group is not working as expected on CME 10.5
CSCuw58631	Crypto fragmented traffic may cause an ISM-VPN failure
CSCuv98094	I/O pool not freed soon enough and kept running out when it is depleted
CSCup31456	Input queue of Dialer interface is wedged
CSCuv01607	Invalid spi, Attempt to use contiguous buffer as scattered, Full queue
CSCux04108	ISM drops fragmented traffic if virtual-reassembly configured (2)
CSCuw90008	ISM is stuck during installation of GETVPN policy
CSCuw86250	ISM: Fragmented ESP packet reassembled+decrypted but not forwarded
CSCuw86293	ISM: GRE over IPsec double account packets input on Tunnel interface
CSCut97977	More CPU with Reventon for jumbo packet ping traffic
CSCut16273	On ISM with no ip cef session fails with mem leak after clear crypt ses
CSCux00363	Router crash when freeing FW SID
CSCuw08247	Smart Init needs to assign more memory to the IO pool when using ISM-VPN
CSCuw94105	crypto_engine ip packets processing issue with 'non-zero' ip precedence
CSCuw02624	IOS:Cannot periodically establish SSL connection
CSCux07523	ISR crash when reaching crypto bandwidth limit
CSCux08101	ISR crash with reaching maximum crypto bandwitdth limit
CSCuv22733	XML cannot be parsed from IOS
CSCuv42644	Add support for cwmp wan default on dot1q ethernet sub-interfaces
CSCuw77959	1801M - %DATACORRUPTION-1-DATAINCONSISTENCY: copy error
CSCur64384	901:IP over DHCP failed when dynamically change from static to dhcp ip
CSCuw95697	Crash due to DHCP.
CSCur83620	DHCP configured interface transitions to static after interface flap
CSCuv86130	DHCPv6 Traceback message configured IPv6 DHCP client
CSCux06571	Memory Leak with DHCPv6 server
CSCux06944	IPv6 over PPPoE: delay to update routing table
CSCut35474	authentication open does not work on switch port of C800 router
CSCuv22078	C881W: Inconsistent behaviour with Guest PC plugged behind Avaya Phone
CSCuv91653	C891F MAB slow to authenticate after link state change
CSCuu15851	DHCP relay does not work for 2nd authenticated host on multi-auth port
CSCut23908	HWIC loses connectivity to IP's outside subnet when 802.1x process done
CSCuw90662	MODEMPASS usage doesn't show up in show call active voice brief output
CSCuw12141	show ip egirp topology all-links or prefix/mask doesn't delete correctly
CSCuw43115	CSR1Kv XE 3.13.3S Crashed on clearing ip ospf process
CSCuw53679	Dialer interface is introducing an extra decrement of IPv6 TTL value
CSCuv86229	Interrupt stack overrun and crash due to recursive tunnel lookup, Part 2
CSCux06124	Part of records lost after export by FNF from MMA punt/inject path
CSCuu41771	members in a 2960 cluster unable to save configuration in IOS 15.x
CSCuv36677	IOS allows RC4-MD5 and RC4-SHA1 SSL ciphers to be negotiated by default
CSCuu98020	Asymmetic carrier delay does not work on ASR1K
CSCus76858	IPS auto update failed, Internet links goes down and comes up
CSCut70749	%SYS-2-NOBLOCK: may_suspend with blocking disabled. -Process= 'IP Input'
CSCuw52464	ISR reload with info file for FW feature set
CSCuw40391	IPS: Crash@ips_dp_delete_half_open_session Part II
CSCut42121	Remove the IPS from show license feature list
CSCuu95635	1941 15.4(2)T Crash System returned to ROM by bus error at PC 0x26183C40
CSCup94022	CWS: WL: Crash seen after 'no whitelist down' during XML Download
CSCuv61789	ISR CWS Connector stalling on large downloads
CSCuu82082	Memory corruption crash due to cont_scan_display_session
CSCuu19587	Tracebacks and TFO frame errors seen with WAAS-Ex, ISM-VPN and GetVPN
CSCuu25580	VTY0-4 lines are modified if WLC is access via Web UI.
CSCuw49281	webui transport configuration caused router to crash
CSCuu77403	%LINK-4-TOOBIG Messages Seen on ISR 3945 with L2TPv3
CSCuw37949	BFD goes down when applying ACL
CSCuw89081	Extended ACL applied on Line VTY does not match traffic by destination
CSCuw15904	High CPU due to IP Input in specific tunnel traffic
CSCus03761	Stack overflow crash @ ip_epm_proxy_slow_check.
CSCuu48675	IPv6 PBR ACL does not match on the DSCP being set by input class-map
CSCuw08398	Tunnel Tracebacks observed when changing the PFR loopback address
CSCut92547	Crash at pp_delete_socket
CSCuu12283	CUBE failed to create DP session on STBY for Webex flow
CSCuw65318	Cube is not passing REFER on second transfer attempt
CSCuw76689	CUBE SIP crash when x-route-tag option in Via header is received
CSCuw28957	DMVPN Hub has no Crypto Sockets in Listen state
CSCuw56669	DMVPN Phase3 OSPF Broadcast: NHO addition fails - insufficient resources
CSCux00183	Need documentation around flow restrict command for ezvpn
CSCuw95699	Traffic dropping after receiving TEK rekey on ISRG2 GM
CSCuw82187	IPSec MIB: Global IPsec Traffic counters are reported incorrectly
CSCuw32333	DMVPN w/ IKEv2 Flaps with PFS and Onboard CE enabled
CSCuu60689	Packets dropped by ingress ACL when IPSec + ACL configured for IPv6
CSCuw36170	System will hang if system is power cycled during FPGA image upgrade
CSCuv81298	LFA SPF causes cpuhog and crash in scaled test with 400 nodes
CSCuw61892	MTU-Size problems with ppp-max-payload enabled on c887VA
CSCuw15247	C891F BRI: Q921 frame exchange is suddenly stopped
CSCuv58273	Leased-line BRI does not come up on boot
CSCuq68795	AP failed to reload the access point with the autonomous software image
CSCuu17770	C887VA- Controller output not displayed correctly.
CSCut49912	Incoming packets from VDSL link discarded under high load
CSCuw81524	Latency values are more for tx-ring 2 than tx-ring 64
CSCuw49668	c897VAB: Bitloading is not working correctly affects SRA
CSCuv06763	c897VAB: Bitswap is not working correctly
CSCus53310	dhcp relay for ip phones not forwarded out
CSCuu90215	Energywise output displays wrong values
CSCuw87040	Inconsistent reloads seen while booting C1905
CSCuv24993	NM-1t3/E3 input queue wedge on 3900e platform
CSCut86321	Tx hang on 2951`s GigabitEthernet IF
CSCuw46836	ehwic-1ge-sfp reports HWIC_HOST-1-RX_CRC_ERROR messages after CSCuo71154
CSCuj86253	2900 w/ Multiple EHWIC-4ESG-P's and L2TPv3 via SVI's drops 50% multicast
CSCuw96558	EHWIC-4ESG duplicated mac address table entries
CSCut16523	NDR for given packet size is not within the reference range
CSCuu88260	no form of ipv6 mld snooping vlan commands are lost after router reload
CSCup91713	Wrr-Queue Strict Prioryt Scheduling issue
CSCut34058	Memory Fragment on SM-X-1T3/E3= with Serial Background process
CSCuv79612	L2TP VPN traffic not passing through Virtual-PPP interface
CSCus82816	Crash in tup_lookup_func in Scansafe feature
CSCuw65792	CWS not associating CN with nested groups when ' , ' (comma) is used
CSCux05779	LISP possible segmentation fault with DDT enabled
CSCuw97075	perf-monitor service policy does not with connection initiator commands
CSCuv18439	CPUHOGS in chunk corruption crashinfos distracts troubleshooting
CSCuv74405	Hosts on interface vlan don't get properly configured
CSCuw20313	Router crash configuring IPv6 over IPv4 tunnel on NEMO tunnel template
CSCut45177	CWS HTTPs traffic fails to load on ISR configured with NVI
CSCuu21270	Traceroute freezes the router with ip nat enable configured
CSCuj05278	Crash with NBAR enabled
CSCuw29957	NBAR: export sys call is not protected from export of length 0
CSCuw17061	Policy attachment failed after downgrade the NBAR protocol-pack
CSCur12200	OnePK PfRv3 - MCP 10/1, Java CD8 - tunnel being configured as source int
CSCuw97020	PfRV3: Syslog not working for application based policy
CSCuv94212	2547oDMVPN:RD and RT Must Match on PE Routers for Spoke to Spoke Tunnels
CSCuu98027	onepk memory corrupt crash when repeating sh policy-map
CSCux04828	[3750X-dot1x] dACL is not taking precedense over interface ACL
CSCux02108	Process watchdog at 'OER Master Controller'
CSCuw65212	Process watchdog crash on 2900 seen with oer_mc_cfg_command
CSCuw41628	Bad chunk reference count, refcount FFFFFFFF
CSCuv46225	Dead memory leak SCCP TLS CLIENT
CSCuw15256	IOS PKI: Certificate validation fails after reload
CSCuw41120	IOS PKI: Temp Self-signed sequence number encoded as signed integer
CSCuw95805	Signed Tcl Script triggers the crash of router
CSCuu82355	Cube should send disassociation time while sending metadata for BYE.
CSCuw65203	Self reload does not happen in some condition.
CSCux07723	Router crash when ISP removes the patch cords connected to Gig 0/2
CSCuv22778	SAF forwarder patterns not reachable after client reboot
CSCux06510	no trap is generated with 'snmp-server enable traps config-copy'
CSCuw73501	Clientless re-writer issue on router
CSCtg60310	While SSLVPN tcp connection terminats, related buffers may not released
CSCuw75695	Router crash due to Process = SSS Manager
CSCuv41355	Unable to telnet -- No wild listener: port 23
CSCuw60760	GCFM: chunk memory corruption
CSCuu53605	dm814x ecan - tec 10.3.3.0 release commit
CSCuu40514	Module hung observed on NIM-4FXS or NIM-4FXO after soak test
CSCuv90724	TCL Script wont honour leg senddigit duration
CSCuw96640	router crashed multiple times at mc_make_packets_DQ
CSCus45019	Media loop detection failure
CSCuv10440	Crash in mgcp_endpt_get_by_callp during regular operations.
CSCur58834	Modem relay calls not establishing on IPv6 base
CSCuw39983	4G router stops forwarding traffic once it is loaded
CSCuv89892	MC7350 modem remains on 'LOW POWER MODE'
CSCux00500	Traffic stopped after Shut/No Shut on cellular interface

Resolved Bugs—Cisco IOS Release 15.6(1)T2

Table 4. Resolved Bugs—Cisco IOS Release 15.6(1)T2
Identifier	Description
CSCuy21675	Crash@username_command with service pwd-encryption & common-criteria cfg
CSCux69225	Mac filtering option "None" sends blank password
CSCuy01051	MPLS VPN over mGRE Routing issue after reload
CSCul15273	AN Link local Tunels not deleted after no autonomic is issued
CSCuy04454	AN: "autonomic connect" interface is not in AN VRF after int reconf.
CSCuy02477	AN: AN creating channel in autonomic connect interface
CSCux51388	AN: CD punting is getting enabled after save & reload without autonomic
CSCuz50338	AN: Crash during bootstrap at hwidb_iftype_unlist
CSCuw79036	AN: Device id/address is not getting populated properly beyond 127
CSCuy87056	AN: Device receives & keeps multiple certificates
CSCux80195	AN: Manual tunnel creation fails after few ACP flap
CSCuy86757	AN: NTP not syncing in recent images
CSCuw89680	AN: Router crashed while recreating channel after save & reload
CSCuw65651	AN: Router crashes after defaulting interface with AN EFP
CSCux75878	AN: UDI getting truncated in "show autonomic registrar devices accepted"
CSCuv87599	Manually entered IKEv2 crypto profile not NVgen-ed with AN active
CSCuy03054	ASR1K IOSd may crash in BGP Accepter process due to segmentation fault
CSCuy20481	Crash due to stale pointer after removing vrf command export AF map
CSCux76332	Deleting a statement in export map, removes other statement
CSCuy03504	Incorrect prefix count upon clearing bgp peering
CSCux62094	Routes are not exported from vrf to global due to incorrect export limit
CSCuy33157	C5921 crashes when access point disabled.
CSCuy44757	c5921 support for VTY 5-15
CSCuw55129	vlan tag removed kernel-2.6.32-504.23.4.el6.i686 and later
CSCuz62786	ISR4K sccp based transcoding hanging dsp-session_leg on data-plane
CSCuv74256	IOS: HMAC key miscalculated with DH Group 21 and IPSec PFS enabled
CSCux68976	Crash in fib_fib_get_fib_tableid
CSCuw52464	ISR reload with info file for FW feature set
CSCuy38707	After RSP switchover, BFD hangs for up to 10 minutes before converging
CSCuv86229	Interrupt stack overrun and crash due to recursive tunnel lookup, Part 2
CSCuz41999	Optimizing the EoGRE endpoint creation/deletion
CSCut92547	Crash at pp_delete_socket
CSCuy48358	Crash during SIP subscribe notify ACK
CSCux25412	Crash with SIP subscribe notify enabled
CSCuz64285	Cube fails to send the SIP Error code response
CSCuy19807	IOS-XE CUBE Hold/Resume Fails when negotiating video
CSCuz69975	Under load crash is seen in CVP REFER_PASSTHRU scenario
CSCuw99554	ASR crashes on removing the sub-interface on HSRP active router
CSCux09048	flow restrict on backup crypto map causes traffic to fail
CSCuz14788	New reg invoke PKI function breaks the GETVPN CRL Checking feature
CSCux25628	Diffie Hellman computation fails due to leak in crypto engine
CSCuv31981	ISR Router Crashes When Trying to Delete a Freed SA
CSCuq91346	Routers crashed when enabling NFAS under the T1 controller
CSCux29806	ISIS routes are not not installed in the routing table from isisdatabase
CSCux89502	PPPoE on MLPPP SHDSL links crashes router: packet in free block
CSCuw15247	C891F BRI: Q921 frame exchange is suddenly stopped
CSCuw49973	%REGISTRY-3-STUB_CHK_OVERWRITE tracebacks seen @ pq3_tsec_subsys_init
CSCut86321	Tx hang on 2951`s GigabitEthernet IF
CSCuw46836	ehwic-1ge-sfp reports HWIC_HOST-1-RX_CRC_ERROR messages after CSCuo71154
CSCut34058	Memory Fragment on SM-X-1T3/E3= with Serial Background process
CSCuy23951	Priority Packets Randomly Fall Under Class-Default Over VWIC
CSCuw14948	HSRP vip ping failure after power off one side Router with SM module
CSCus72718	L2TPv3 session pending between 2 devices
CSCus82816	Crash in tup_lookup_func in Scansafe feature
CSCut45177	CWS HTTPs traffic fails to load on ISR configured with NVI
CSCuy03680	V3Lite IGMP packets sent instead of V3 when UDP based feature is present
CSCuy45804	MCAST: PIM issue tracking RP source address
CSCuz03646	match protocol "netbios-dgm" CLI not working for c800 NPE images
CSCuy31450	Router crashes after reload with protocol pack auto update config
CSCuy71712	FlexVPN: Spoke spawns a virtual access to connect to the hub
CSCuy04757	Crash@ospfv3_router_process_mgd_timers on shut/no shut of sub-intf
CSCuy32709	R-LFA Tunnels not established on setting DS required attribute
CSCux19034	XE3.16 crashes when conf "distribute-list" under router ospf and sh run
CSCuw53025	Cat3850 reports "Error, ECI has run out of event blocks" message
CSCuu25580	VTY0-4 settings are modified if switch is accessed via WebUI
CSCuy85870	Wrong TD next-hop for overlapping prefixes
CSCuy13701	IOS PKI: Crash while editing a VRF aware TP with enrollment profile
CSCuy55849	RTR installs the ISIS(or OSPF) route with Higher Metric in the RIB
CSCuy07343	AN : ipv6 global prefixes are seen in the cisco_autonomic vrf table
CSCuw81424	AN: Router crashes in scale hub & spoke setup
CSCuy39110	ESRST voice gateway crash when SCCP phone goes off-hook
CSCuw57124	Cat3750 stack switch memory leak in MallocLite and Dead memory
CSCuy38709	Memory leak with watcher_create_common.
CSCuy34361	SSH V1 periodically crashes when displaying large volumes of data
CSCuy54623	Evaluation of all for OpenSSL March 2016
CSCuz52528	Evaluation of all for OpenSSL May 2016
CSCux03041	LDP NSR: Session Flaps on Standby RP Due to MD5 Authentication Failure
CSCuu71299	MPLS LDP flap with %TCP-6-BADAUTH: No MD5 digest
CSCuv41355	Unable to telnet -- No wild listener: port 23
CSCus46844	802.1x 3650 Radius Response not picked up by AAA code
CSCux56741	2951 crashes every 15 min due to stacklow
CSCuz03079	ISR-4K Processing Error: H323 Setup parameter "mediaWaitForConnect TRUE"
CSCuy65330	RSVP Reservation Failure Causes Call Drop on Voice to Video Calls
CSCuy15638	Voice ports are stuck in EM_PARK state in e&m-melcas-delay
CSCuz52693	ISR 4K Memory Holding in CCSIP_SPI_CONTROL
CSCus03761	Stack overflow crash @ ip_epm_proxy_slow_check.
CSCuy83854	deb voip application vxml with 1 cvp call caused buffer overflow
CSCuz17364	DTMF Type ahead buffer on GW with Nuance not working

Resolved Bugs—Cisco IOS Release 15.6(1)T1

Table 5. Resolved Bugs—Cisco IOS Release 15.6(1)T1
Identifier	Description
CSCut74192	bfd session not coming up after interface in vrf shut and no shut
CSCux13904	Bolt: Modem stays in boot and hold mode after f/w upgrade
CSCux18010	Cisco Networking Services Sensitive Information Disclosure Vulnerability
CSCuw02624	IOS:Cannot periodically establish SSL connection
CSCux83133	IPv6 intermittent CEF issue
CSCuy04058	ISR-4K IOS CFB resources get into hung state (inactive)
CSCuv27265	ENH: Enable support for TLSv1.1 & TLSv1.2 for http secure server/client
CSCuv36677	IOS allows RC4-MD5 and RC4-SHA1 SSL ciphers to be negotiated by default
CSCut44432	Chunk Manager Leak due to PROTO_COUNTER
CSCux00363	Router crash when freeing FW SID
CSCup94022	CWS: WL: Crash seen after 'no whitelist down' during XML Download
CSCuu82082	Memory corruption crash due to cont_scan_display_session
CSCuv75728	CUBE crashed @ __be_sipSPI_ipip_antiTrombone, Antitrombone Call
CSCuw90105	Found multiple sessions in MF multiple recording server scenario
CSCux33431	VDSL Controller stuck and crash with c897VAB
CSCuw65059	mfib on the line card stuck in Connecting state
CSCux34430	Traffic not flowing through for MAG MNP's with PBR
CSCur51997	Packets coming from outside interface NOT translated
CSCux10171	[3.17] KinPin Crashed when configuring custom HTTP
CSCuo61229	ASR1002 Crashed after 'show pfr master active running'
CSCuu30930	ENH IOS PKI: Client should accept content-type x-x509-next-ca-cert
CSCuw41120	IOS PKI: Temp Self-signed sequence number encoded as signed integer
CSCux17298	ISR-G2: Gigabit Ethernet interface is always in shutdown after reload
CSCuw51653	SIP SRST router in eSRST mode reject phone registration due to + DN
CSCuw96640	router crashed multiple times at mc_make_packets_DQ
CSCux36081	4XXX / ISR3 xcoder fails when stream is send only receive only
CSCuv19830	VOIP_RTCP Traceback on Voice-GW affecting calls sporadically
CSCuy16501	After IOS upgrade users hear static during external calls
CSCux54794	Configuration under the E&M voice-ports are missing after the reload
CSCux45574	DSP channel not released on ISRG3 incoming FXO call
CSCux88265	DSP errors seen and audio fails for MGCP-FXO to IP Phone call
CSCux22874	On demand PCM captures needs to be available on ISR4k routers
CSCuu25704	Memory corruption in the IO pool when a t38 fax gateway receives t37 fax

Resolved Bugs—Cisco IOS Release 15.6(1)T

Table 6. Resolved Bugs—Cisco IOS Release 15.6(1)T
Identifier	Description
CSCuw06084	DTMF not getting recognized on ISR G3 when using TCL Script
CSCuw33578	Traceback and router crash seen in SIP SNR feature
CSCuw99512	3900e build failure in t_base_6, v156_1_t_throttle due to CSCuw26842
CSCuw28058	CWMP: RemoteHost parameter can't be NULL on creating portmapping entry
CSCuw28759	Duplicate Entries created in PortMapping Table
CSCuw26842	ManageableDevice Table does not get updated on removing an End device
CSCuw82081	LISP CEF: fwd-native routes gleaned for LISP not forwarded natively
CSCuw19340	Mixed Mode: Tunnel changes for mixed mode support for VTI.
CSCuv04831	PIM tunnel does not reuse inactive IDB
CSCuw67113	crash seen in CVP load REFER scenarios
CSCuv06763	c897VAB: Bitswap is not working correctly
CSCuw60669	No negative reply sent by LISP MS with DDT peer offline
CSCuw40623	NBAR timer running for 7 weeks may trigger an unexpected reload
CSCuw51471	PfRv3 - SYS-3-CPUHOG process CENT-BR-green with 1 Traffic-class
CSCuw47130	STCAPP commands gets removed after reloading 43XX/44XX routers
CSCuw71493	XE317 - One way voice is heard on LMR half duplex call with SCCP phone

Cross Platform Release Notes for Cisco IOS Release 15.6M&T

Bias-Free Language

Book Title

Cross Platform Release Notes for Cisco IOS Release 15.6M&T

Chapter Title