The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
This chapter describes open and resolved severity 1 and 2 caveats and select severity 3 caveats:
The “Open Caveats” sections list open caveats that apply to the current release and may apply to previous releases. A caveat that is open for a prior release and is still unresolved applies to all future releases until it is resolved.
The “Resolved Caveats” sections list caveats resolved in a specific release, but open in previous releases.
The bug IDs are sorted alphanumerically.
 Note |
The Caveats section includes the bug ID and a short description of the bug. For details on the symptoms, conditions, and workaround for a specific caveat you must use the Bug Search Tool. |
Cisco Bug Search Tool (BST), the online successor to Bug Toolkit, is designed to improve effectiveness in network risk management and device troubleshooting. You can search for bugs based on product, release, and keyword, and aggregates key data such as bug details, product, and version. For more details on the tool, see the help page located at http://www.cisco.com/web/applicat/cbsshelp/help.html
|
Caveat ID Number |
Description |
|---|---|
|
MPLS MTU not correctly derived from interface MTU after reload |
|
|
Traffic sent to the subnets routed over VRF, packets ends up in Default class - wrong classification |
|
Caveat ID Number |
Description |
|---|---|
|
Unnecessary RIB updates when metric-style transition is configured. |
|
|
VRRPv3 failing on port-channel sub-interface. |
|
|
IOS-XE: secondary ip address invisible when interface configure with DHCP as primary ip address |
There are no resolved caveats for this release.
|
Caveat ID Number |
Description |
|---|---|
|
Cisco IOS and IOS XE Software MP-BGP EVPN Denial of Service Vulnerability |
|
|
Cisco IOS and IOS XE Software Split DNS Denial of Service Vulnerability |
|
|
Segmentation fault observed in BGP - UNIX-EXT-SIGNAL: Segmentation fault(11), Process = BGP Scanner |
|
|
Dynamic neighbor does not form when peer-group is shutdown in different vrf |
|
|
BGP: advertised community list is malformed due to GSHUT community |
|
Caveat ID Number |
Description |
|---|---|
|
T1 serial interface is down with encapsulation mode as PPP with remote loopback configuration as IBOC |
|
|
RSP2A-64 and RSP2A-128 Kernel Crash observed with Core Port Shut/Un-shut |
|
|
Support for NCS4200-1T8LR-PS in NCS4202-SA |
|
Caveat ID Number |
Description |
|---|---|
|
ASR920: Router_RP_0_fman_rp crash on applying conditional crypto debug |
There are no open caveats for this release.
|
Caveat ID Number |
Description |
|---|---|
|
Dying Gasp in Org Specific PDU is sent instead of Informational PDU |
|
|
ISR4K fails to authenticate users via dot1x following interface flap |
|
|
CTS Environment-data is not refreshed on the device |
|
|
Default ip forward-protocol udp xx changes to no ip forward-protocol udp xx after rollback |
|
|
Cat3k crash in IGMP code due to invalid source count in DNS lookup |
|
|
RADIUS attribute 4 (NAS-IP-Address) is not honored |
|
|
HSRPv2 crash is observed while retrieving group from received packet |
|
|
Router crashes on running show policy-map interface output command |
|
|
Router crashes due to watchdog after adding a prefix-list/ Route-map entry to existing route map |
|
|
mGRE L3VPN is broken after reload |
|
|
IP SLA for Path-Jitter returning a value is not defined by the MIB |
|
|
When issuing ip helper-addresss x.x.x.x commands show run and show run all commands show differently |
|
|
Two interfaces of client in different VRF connected to same vlan of server are not able to get IP via DHCP |
|
|
AAA accounting issue occurs after router reload when mGRE and L3VPN are configured |
|
|
ip access-list logging hash-generation command removes ACL statements after reload |
|
|
LISP Map-cache is not updated correctly after wired Host-mobility |
|
|
Switch stops responding to CoA |
|
|
Adjacency SIDs are not detected in MPLS traffic-eng topology (interop issue) |
|
|
ICMP Redirect Message sends incorrect next-hop in the gateway address |
|
|
The order of cEigrpPeerAddrType value and cEigrpPeerAddr value does not follow SNMP Object Navigator |
|
|
IP gratuitous ARP is not VRF aware |
|
|
Router may crash due to segmentation fault after running EEM script |
|
Caveat ID Number |
Description |
|---|---|
|
Intermittent packet drops for small size vrf ping (64-72) |
|
|
ToD UBX Format - Incorrect header and checksum calculation |
|
|
ASR920 CSDL: ASR-920-12SZ-IM Secure FPGA |
|
|
ASR920 CSDL:[ASR-920-4SZ-A,ASR-920-4SZ-D,ASR-920-12CZ-A,ASR-920-12CZ-D, ASR-920-10SZ-PD] secure FPGA |
|
|
ASR920 CSDL : [ASR-920-24SZ-M, ASR-920-24TZ-M, ASR-920-24SZ-IM] secure FPGA |
|
Caveat ID Number |
Description |
|---|---|
|
C3650 traffic is not blocked although hit deny ACL entry |
|
|
4500X does not run dot1x when a laptop wakes from sleep mode |
|
|
Amur failing over without fail next-method or no-response next method |
|
| show interface port channel command falsely reports output drops when there are no actual output drops | |
|
ICMP Redirect Message sends incorrect next-hop in the"gateway address" |
|
|
FNF monitor download to DP fails after netflow record is changed |
|
|
Crash is observed when IOS adapts shaping with Adaptive QoS over DMVPN configured |
|
|
Prefixes are stuck indefinitely in the BGP pending-prefixes list |
|
|
Partial Power Failure in Stack Causes Interfaces to Become "shutdown" |
|
|
SSS Manager Traceback is observed when test MLPPP is performed |
|
|
Crash is observed after CPUHOG in ISDN L2D SRQ Process |
|
|
Addition or edits to numbered OG ACL using access-list command does not re-expand the ACL |
|
|
Software crashes due to memory corruption after packet trace is enabled |
|
|
DHCP Server sends Renew ACKs to Clients with 00:00:00:00:00:00 MAC in L2 frame |
|
|
Device crashes if you unconfigure the NTP on the device |
|
|
Subscribers cannot re-login due to CoA time-out (lite-sessions in routed mode) |
|
|
Router crashes while executing show commands using | (pipe) to filter the output |
|
|
Memory overlay crashes when using include-cui |
|
|
PnP Agent should detect image upgrade scenario and configure dialer to bring up cellular interface |
|
|
Router crashes upon receiving Radius Access-Accept message |
|
|
Memory leaks at hman process |
|
|
WSMA crash formats show command output |
|
|
After RSP switchover, label imposition is not programmed in Software on APS standby router |
|
|
CTS PACS does not download to the devices |
|
|
Router crashes by handling DHCP packet |
|
|
When sending account-logon, ISG does not reply with ACK nor NACK |
|
|
Crash is observed when polling IPForwarding MIB |
|
|
Wrong label programming leads to traffic drop |
|
|
When FQDN is used for APN, IOS DNS resolves FQDN to IP, but GTP stays in DNS pending and IP 0.0.0.0 |
|
|
Tail drops on IPSLA sender when using scaled udp-jitter probes |
|
|
radius-server attribute 31 command is broken on LNS when LAC sends Remote-Id string |
|
|
isdn cause-location command supports switch-type primary-ntt |
|
|
ip dns primary command does not get removed |
|
|
QoS fails to apply to tunnel2 when underlying tunnel1 reachability changes |
|
|
name-ip_address mapping is bypassed when the ip domain command is configured on router |
|
|
no login on-success log command does not persist across device reloads |
|
|
Device crashes @ radius_io_stats_timer_handler due to dynamic-author |
|
|
VRF aware reverse DNS lookup is not working |
|
|
Ping between 2 Interfaces is not working; dialer interface is interferring in the ARP Processs |
|
|
SRMS tries to build a snapshot when there are no SIDs |
|
|
Class-attributes are duplicated after EAP reauthentication in ISG radius proxy scenario |
|
|
ASR1K BGP PIC Repair path is broken after link flap |
|
|
VXLAN EVPN BGP NEXTHOP is not correctly changed with Route-map |
|
|
DNAC 1.4: SW provisioning fails due to DNAC failure to push command |
|
Caveat ID Number |
Description |
|---|---|
|
T1 serial interface goes down with encapsulation mode as PPP with remote loopback config as IBOC. |
|
Caveat ID Number |
Description |
|---|---|
|
ASR-920: Ports not comming up after 12x1GE upgrade license installation |
|
Caveat ID Number |
Description |
|---|---|
|
IOT: For Serial(with RS232) interface IfType comes as other instead of serial/RS232 |
|
|
MLP MRAPS Convergence is high on Work-Active SSO node |
|
|
IOT: For C3794 controller Listing type as VOICEEM(100) insteadof VoiceEnCap(103) |
|
|
Unpredictable asymmetry across the port on C37.94 IM |
|
|
Cem Sys : LOF/AIS are set on T3 under STS in arrive but not asserted in IOS |
|
|
Configuration change on E&M interface results in xconnect failure |
|
Caveat ID Number |
Description |
|---|---|
|
RSP1:MPLS MTU programming fails on standby with latest image |
|
|
CRETE:Cylon Mgr crash @ adjmgr_get_fid_index |
|
|
ASR920 Platform-SCC: Act 2 authentication failed: 0xFB - ACT2_ERR_READ_FAILURE |
|
|
ENM flaps/hangs on configuring CEM interface |
|
|
16101:cylon_mgr crash@nile_cef_prefix_v4u_get_adj_info seen in soak run on 16th July Polaris image |
|
Caveat ID Number |
Description |
|---|---|
|
Slow response when typing in CLI on telnet session |
|
|
IOT: For Serial(with RS232) interface IfType comes as other instead of serial/RS232 |
|
|
IOT: For Serial IM, flowcontrol is not applicable |
|
|
Require Environmental Syslog message during Recovery of temperature and voltage Threshold Violation |
|
|
Configuration change on E&M interface results in xconnect failure |
|
|
Unpredictable asymmetry across the port on C37.94 IM |
|
|
ENM flaps/hangs on configuring CEM interface |
|
|
Running line rate traffic on an internal loopback impacts BFD session |
|
|
CEM Pseudo wire flap on SSO |
|
|
ACR fails with -/+ 50 ppm tolerance |
|
|
FNF CLIs are visible for templates other than netflow-video in Striker |
|
Caveat ID Number |
Description |
|---|---|
|
IP directed-broadcast functionality not working on RSP1/RSP2 |
|
|
THS:After SSO/ISSU observed AIS Alarm in SYSTEM THS with XE318SP Image |
|
|
Traffic forwarding not happening for VLANs added via "encap dot1q add" command in TEFP |
|
|
Uni-directional communication failure with IOT Legacy IMs |
|
|
Need to Accept User Configurable 4Wire E&M CEM Payload and Dejitter Buffer Values |
|
|
T1 Service Latency is Asymmetric in a Simple Linear Topology |
|
|
RSP3C-200-S RSP module crashes while MPLS TE tunnel interfaces comes up |
|
|
C37.94 port change leads to controller flap |
|
|
TDM-IOT: observing uni-directional traffic failure after replacing TDM IM with IOT IM |
|
|
9400: entSensorThreshold traps are generated even when temperature threshold isn't crossed |
|
|
E&M:Payload size other than multiple of 48 (96,192...) bytes never work in TO mode |
|
|
ENM Type 3 doesnt work on port 4 , if port 0 is also configured for ENM Type TO |
|
|
Adptive Clock Rec and master CEM is chosen automatically on the CEM circuit in IMA8D |
|
|
Mac Flap Syslog Notification not working after reload |
|
|
Type TO is not working for different payload sizes |
|
|
ENM IM : remove signal command from Type TO mode |
|
Caveat ID Number |
Description |
|---|---|
|
Tx Packets or Tx Bytes generated is always lesser than configured rate-steps |
|
|
CFM ping failing over dot1ad and xconnect interfaces |
|
|
|
|
ASR920: On Boot-up RSP2A-64 and RSP2A-128_Mgr Crash in L3 Adj EAID Allocation due to Invalid ASIC Index |
|
Caveat ID Number |
Description |
|---|---|
|
ASR920 - Display issue - Egress i/f and L2 stats shows "unknown" and no packet drops |
|
|
G8265.1: PTP flaps between Holdover and Locked with 64/64 packet rate and Hot Standby |
|
|
IPv4 deny ACL applied in the BDI is blocking L2 switched traffic under certain conditions |
|
|
ASR920: TCAM phase error message flood in RSP2A-64 and RSP2A-128 mgr log file |
|
|
Egress QOS fails when speed is changed at interface via nego auto, speed CLI command |
|
Caveat ID Number |
Description |
|---|---|
|
Member link of Port channel gets removed on doing a SSO on the peer end |
|
|
ASR920 - Display issue - Egress i/f and L2 stats shows "unknown" and no packet drops |
|
|
ASR 920 : Mid Point LSP creation failure after reload with latest polaris Image |
|
|
L3 convergence for REP is more than 50ms, which is incorrect |
|
|
G8265.1: PTP flaps between HoldOver and Locked with 64/64 packet rate and Hotstandby |
|
Caveat ID Number |
Description |
|---|---|
|
ASR920 : Enhance the show command to dump the DDR interrupt registers |
|
|
RSP2A-64 and RSP2A-128 _Mgr Crash in Adjacency Manager LoadBalance Get FID on Core Gigs Flaps SOAK |
|
|
G8275.1: Master disqualified even though packets are flowign fine |
|
|
RSP1-Continous ESMC tracebacks observed after IMA8T OIR followed by SSO |
|
|
POE configuration should be disabled if PSU is 24V DC |
|
|
ASR-920-12CZ : SyncE input does not work on Copper AMS ports configured in auto media-detect mode |
|
|
DATA traffic getting wrongly classified in H-QoS |
|
|
RSP1-Continous ESMC tracebacks observed after IMA8T OIR followed by SSO |
|
|
Traffic drop, on reconfiguring l2vpn sessions after sso on peer |
|
|
ASR920//15.6(2)S1//Broadcast Storm detected when interface is brought up. |
|
|
Cisco IOS XE Software for Cisco ASR 920 Series Routers Arbitrary File Overwrite Vulnerability |
|
|
VLAN based egress classfication fails for incoming untagged frames; and for tagged frames with POP0 |
|
|
DOM not working for SFP-10G-LR from cisco-AVAGO vendor |
|
|
ISIS FRR : FRR ReOpt Issue, FRR state pointing to Label backup even with primary link up |
|
Caveat ID Number |
Description |
|---|---|
|
Broadcast Storm detected when interface is brought up. |
|
|
PTP PI counters were not shown properly |
|
|
PTP clock creation fails for specific sequence of triggers |
|
|
PTP hybrid BC failed as config appiled before netsync locked REF alarm cleared |
|
|
SyncE input does not work on Copper AMS ports configured in auto media-detect mode |
|
|
IOSd Crash on deleting PTP loopbacks during ISSU SOAK |
|
|
BC slave port stuck at Initializing state upon BC gets reconfigured |
|
|
After ASR9k PTP reconfiguration, slave 903 stuck in freq-lock state |
|
|
G8275.1: Master disqualified even though packets are flowign fine |
|
|
Crash due to DHCP snooping when a bridge domain is changed. |
|
|
Label mismatch and traffic black holing. |
|
|
Egress interfacei/f and L2 "unknown" cause packet drops and traffic blackholing. |
|
|
rLFA repair path stays programmed in hardware even when primary is back UP. |
|
|
IGMP snooping: Packet drops due to IGMP leave scenario in different bridge domain. |
|
|
IPsec offload for Data encryption is not supported on Cisco ASR-920-12SZ-IM. |
|
|
ASR-920-24SZ-IM bootflash flooding with pman message - ISR (slice-3) 'XGPCS_LINE_RX_RXINT |
|
|
IOMD ERR logs on auto-negotiation is observed continuously, which leads to bootflash space exhaustion. |
|
|
Command Injection vulnerability in platform usb modem. |
|
|
ASR-920-12CZ: SyncE input does not work on Copper AMS ports configured in auto media-detect mode. |
|
Caveat ID Number |
Description |
|---|---|
|
Power over Ethernet (PoE) is now supported in Cisco IOS XE Everest 16.6.1. |
|
|
SETS introducing 1pps out value in 479ms as compared to input 1pps |
|
|
HBC Slave router doesnot choose best clock based on Clock Class |
|
|
1 PPS under a virtual port remains down after SSO on RSP2. |
|
|
IPv4 ACL is still active when deleted from interface configuration. |
|
|
Cylon Manager Process crashes at bfd_oamengine_ui_get_tx_buffer_table_idx. |
|
|
"MET ENTRYS EXHAUSTED" caused router to crash. |
|
|
Autonomic Networking: Layer 2 Channel creation failure on router |
|
|
Layer 2: OSPF over untag BDI failed after switching from tagged BDI to untag. |
|
|
Not able to scale IPv4 Tunnels for MVPN GRE. |
|
|
Throughput shows inaccurate values in SADT statistics for 1564. |
|
|
Unable to configure BGP EVPN services on ASR-920-12SZ-IM. |
|
|
System crash with MVPN GRE with SDM default template. |
|
|
cylon_mgr: ****MET ENTRYS EXHAUSTED ***** logs seen frequently |
|
|
Out of order/duplicate packets received at the mutlicast receiver end. |
|
|
Traffic drop seen for some multicast groups after interface flap in mpls P2MP setup. |
|
|
BDI MTU config gets lost after reboot. |
|
|
Temperature rise syslog message displays on console when PSU remove and insertion. |
|
|
Configure/unconfigure "l2protocol peer cdp" tracebacks are seen. |
|
|
Cylon manager crashes while defaulting the running SLA's interface. |
|
|
Observing media type showing unkown on few reloads. |
|
|
ISIS: FRR with unnumbered interface leads to traffic loss until TI-LFA repair path is removed. |
|
|
Traffic drops are seen upon POA failover with PW-grouping. |
|
|
EoMPLS: FRR backup path is not displayed for the PW's in the MPLS infrastructure CLI's. |
|
|
Traffic loss seen in endpoint_sso_after_path_protection_trigger. |
Feedback