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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
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Caveat ID Number |
Description |
|---|---|
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MPLS MTU not correctly derived from interface MTU after reload |
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Traffic sent to the subnets routed over VRF, packets ends up in Default class - wrong classification |
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Caveat ID Number |
Description |
|---|---|
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Unnecessary RIB updates when metric-style transition is configured. |
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VRRPv3 failing on port-channel sub-interface. |
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IOS-XE: secondary ip address invisible when interface configure with DHCP as primary ip address |
There are no resolved caveats for this release.
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Caveat ID Number |
Description |
|---|---|
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Cisco IOS and IOS XE Software MP-BGP EVPN Denial of Service Vulnerability |
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Cisco IOS and IOS XE Software Split DNS Denial of Service Vulnerability |
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Segmentation fault observed in BGP - UNIX-EXT-SIGNAL: Segmentation fault(11), Process = BGP Scanner |
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Dynamic neighbor does not form when peer-group is shutdown in different vrf |
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BGP: advertised community list is malformed due to GSHUT community |
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Caveat ID Number |
Description |
|---|---|
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T1 serial interface goes down with encapsulation mode as PPP with remote loopback configuration as iboc. |
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Support for NCS4200-1T8LR-PS in NCS4202-SA |
There are no resolved caveats for this release.
There are no open caveats for this release.
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Caveat ID Number |
Description |
|---|---|
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ISR4K fails to authenticate users via dot1x following interface flap |
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CTS Environment-data is not getting refreshed on the device |
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default ip forward-protocol udp xx changed to no ip forward-protocol udp xx after rollback |
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Cat3k crash in IGMP code due to invalid source count in DNS lookup |
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RADIUS attribute 4 (NAS-IP-Address) is not honored |
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HSRPv2 crash whilst retrieving group from received packet |
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Router crashed on running show policy-map interface <> output command |
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Crash due to watchdog after adding a prefix-list/ Route-map entry to existing route map. |
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mGRE L3VPN broken after reload |
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IP SLA for Path-Jitter returning a value which isn't defined by the MIB |
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When issuing ip helper-addresss x.x.x.x command, "sh run" and "sh run all" show differently |
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2 interfaces of client in different vrf connected to same vlan of server not able to get ip via dhcp |
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AAA accounting issue after router reload when mGRE and L3VPN configured |
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"ip access-list logging hash-generation" removes ACL statements upon reload |
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LISP Map-cache not updated correctly after wired Host-mobility |
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Switch stop responding to CoA |
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Adjacency SIDs not detected in mpls traffic-eng topology (interop issue) |
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ICMP Redirect Message is sending incorrect next-hop in the "gateway address" |
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The order of cEigrpPeerAddrType value and cEigrpPeerAddr value does not follow SNMP Object Navigator |
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ip gratuitous ARP is not VRF aware |
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Router may crash due to segmentation fault after running EEM script |
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Caveat ID Number |
Description |
|---|---|
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Intermittent packet drops for small size vrf ping (64-72) |
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ToD UBX Format - Incorrect header and checksum calculation |
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Secure FPGA from improper upgrade |
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Secure FPGA from improper upgrade |
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Secure FPGA from improper upgrade |
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Caveat ID Number |
Description |
|---|---|
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C3650 traffic will not be block although hit deny ACL entry |
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4500X does not run dot1x when a laptop wakes from sleep mode |
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Amur failing over w/o 'fail next-method' or 'no-response next method' |
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"show interface port-channel" falsely reports output drops when there are no actual output drops |
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ICMP Redirect Message is sending incorrect next-hop in the'"gateway address" |
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FNF monitor download to DP failed after changing netflow record |
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Crash when IOS is adapting shaping with Adaptive QoS over DMVPN configured |
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Prefixes are stuck indefinitely in the BGP pending-prefixes list |
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Partial Power Failure in Stack Causes Interfaces to Become "shutdown" |
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SSS Manager Traceback observer when test MLPPP |
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Crash after CPUHOG in ISDN L2D SRQ Process |
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Addition/Edits to numbered OG ACL using "access-list <>" command does not re-expand the ACL. |
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Software crash due to memory corruption after packet trace was enabled. |
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DHCP Server sends Renew ACKs to Clients with 00:00:00:00:00:00 MAC in L2 frame |
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Device crashing if we unconfigure the NTP on the device |
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Subscribers cannot re-login due to CoA time-out (lite-sessions in routed mode) |
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Router crash while executing show commands using '|' (pipe) to filter the output. |
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Memory overlay crash when using include-cui |
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PnP Agent should detect image upgrade scenario and configure dialer to bring up cellular interface |
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ASR1001-X crashed upon receiving Radius Access-Accept message |
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Memory leak at hman process |
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WSMA crash formatting show command output |
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After RSP switchover label imposition was not programmed in Software on APS standby router |
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CTS PACS not downloading to the devices |
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ASR1k crashes by handling DHCP packet |
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When sending account-logon ISG do not reply with ACK nor NACK. |
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Crash when polling IPForwarding MIB |
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Wrong label programming leading to traffic drop |
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When FQDN used for APN, IOS DNS resolves FQDN to IP, but GTP stays in DNS pending and IP 0.0.0.0 |
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Tail drops on IPSLA sender when using scaled udp-jitter probes |
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"Radius-server attribute 31" command broken on LNS when LAC sends Remote-Id string |
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isdn cause-location command support for switch-type primary-ntt |
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ip dns primary command does not get removed |
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QoS fails to apply to tunnel2 when underlying tunnel1 reachability change |
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name-ip_address mapping is bypassed when the ip domain command is configured on Cisco C1111X Router |
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no login on-success log CLI does not persist across device reloads |
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Device crashed @ radius_io_stats_timer_handler due to dynamic-author |
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VRF aware reverse DNS lookup not working |
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ping between 2 Interfaces is not working , dialer interface is interferring in the ARP Processs |
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SRMS tries to build a snapshot when there are no SIDs |
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Class-attributes duplicated after EAP reauthen. in ISG radius proxy scenario |
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ASR1K BGP PIC Repair path broke after link flap |
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VXLAN EVPN BGP NEXTHOP not correctly changed with Route-map |
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Caveat ID Number |
Description |
|---|---|
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T1 serial interface goes down with encapsulation mode as PPP with remote loopback config as IBOC. |
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Caveat ID Number |
Description |
|---|---|
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ASR-920: Ports not comming up after 12x1GE upgrade license installation |
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Caveat ID Number |
Description |
|---|---|
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IOT: For Serial(with RS232) interface IfType comes as other instead of serial/RS232 |
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MLP MRAPS Convergence is high on Work-Active SSO node |
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IOT: For C3794 controller Listing type as VOICEEM(100) insteadof VoiceEnCap(103) |
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Unpredictable asymmetry across the port on C37.94 IM |
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Cem Sys : LOF/AIS are set on T3 under STS in arrive but not asserted in IOS |
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Configuration change on E&M interface results in xconnect failure |
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Caveat ID Number |
Description |
|---|---|
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RSP1:MPLS MTU programming fails on standby with latest image |
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CRETE:Cylon Mgr crash @ adjmgr_get_fid_index |
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ASR920 Platform-SCC: Act 2 authentication failed: 0xFB - ACT2_ERR_READ_FAILURE |
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ENM flaps/hangs on configuring CEM interface |
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16101:cylon_mgr crash@nile_cef_prefix_v4u_get_adj_info seen in soak run on 16th July Polaris image |
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Caveat ID Number |
Description |
|---|---|
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Slow response when typing in CLI on telnet session |
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IOT: For Serial(with RS232) interface IfType comes as other instead of serial/RS232 |
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IOT: For Serial IM, flowcontrol is not applicable |
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Require Environmental Syslog message during Recovery of temperature and voltage Threshold Violation |
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Configuration change on E&M interface results in xconnect failure |
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Unpredictable asymmetry across the port on C37.94 IM |
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ENM flaps/hangs on configuring CEM interface |
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Running line rate traffic on an internal loopback impacts BFD session |
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CEM Pseudo wire flap on SSO |
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ACR fails with -/+ 50 ppm tolerance |
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FNF CLIs are visible for templates other than netflow-video in Striker |
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Caveat ID Number |
Description |
|---|---|
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IP directed-broadcast functionality not working on RSP1/RSP2 |
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THS:After SSO/ISSU observed AIS Alarm in SYSTEM THS with XE318SP Image |
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Traffic forwarding not happening for VLANs added via "encap dot1q add" command in TEFP |
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Uni-directional communication failure with IOT Legacy IMs |
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Need to Accept User Configurable 4Wire E&M CEM Payload and Dejitter Buffer Values |
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T1 Service Latency is Asymmetric in a Simple Linear Topology |
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RSP3C-200-S RSP module crashes while MPLS TE tunnel interfaces comes up |
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C37.94 port change leads to controller flap |
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TDM-IOT: observing uni-directional traffic failure after replacing TDM IM with IOT IM |
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9400: entSensorThreshold traps are generated even when temperature threshold isn't crossed |
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E&M:Payload size other than multiple of 48 (96,192...) bytes never work in TO mode |
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ENM Type 3 doesnt work on port 4 , if port 0 is also configured for ENM Type TO |
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Adptive Clock Rec and master CEM is chosen automatically on the CEM circuit in IMA8D |
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Mac Flap Syslog Notification not working after reload |
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Type TO is not working for different payload sizes |
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ENM IM : remove signal command from Type TO mode |
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Caveat ID Number |
Description |
|---|---|
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Tx Packets or Tx Bytes generated is always lesser than configured rate-steps |
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RSP2 MPLS WRT - CFM ping is not working in SLMoVPLS |
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CFM ping failing over dot1ad and xconnect interfaces |
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IOS shim client iosd-spa took 4432 msec to process a ether_media_type message |
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On Boot-up Cylon_Mgr Crash in L3 Adj EAID Allocation due to Invalid ASIC Index |
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Caveat ID Number |
Description |
|---|---|
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Display issue - Egress i/f and L2 stats shows "unknown" and no packet drops |
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G8265.1: PTP flaps between HOLDOVER and LOCKED with 64/64 packet rate and HOTSTANDBY |
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IPv4 deny ACL applied in the BDI is blocking L2 switched traffic under certain conditions |
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TCAM phase error message flood in cylon mgr log file |
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Egress QOS Fails when speed is changed at interface via nego auto, speed cli command |
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BFD stuck at init state for Sessin ID 1023 alone on RSP3C after link flap |
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Caveat ID Number |
Description |
|---|---|
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Crash seen when WAN-PHY mode is enabled in RSP3 |
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RSP2:BCPoMLPPP: %FMFP-3-OBJ_DWNLD_TO_DP_FAILED console logs results in pending/error object |
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Display issue - Egress i/f and L2 stats shows "unknown" and no packet drops |
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MLP MRAPS Convergence is high on Work-Active SSO node |
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L3 convergence for REP is more than 50ms, which is incorrect |
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RSP3:PC stays in suspended state on IM OIR |
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100BASE EX showing wrong PID in all UEA platforms |
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IOT: For C3794 controller Listing type as VOICEEM(100) insteadof VoiceEnCap(103) |
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RSP3 - Router crash after "debug platform condition" command is applied. |
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G8265.1: PTP flaps between HOLDOVER and LOCKED with 64/64 packet rate and HOTSTANDBY |
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Dev_pluggable inconsistent console log seen in THS |
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Dying gasp snmp trap not seen with RSP2 |
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Mid Point LSP creation failure after reload with latest polaris Image |
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Member link of Port channel gets removed on doing a SSO on the peer end |
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Caveat ID Number |
Description |
|---|---|
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Wrong marking for locally generated packet of BFD,LDP, and BGP |
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Cylon_Mgr Crash in Adjacency Manager LoadBalance Get FID on Core Gigs Flaps SOAK |
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RSP3 which is locked to GNSS VP is not giving better accuracy |
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Observing error msg when applying policy map on rs232 interface. |
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G8275.1: Master disqualified even though packets are flowign fine |
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POE config should be disabled if PSU is 24V DC |
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SyncE input does not work on Copper AMS ports configured in auto media-detect mode |
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RSP3: IOSd Crash on Deleting PTP Loopbacks during ISSU SOAK |
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IOT-E&M:To Clear wp3 abcd_rcvd bits in qslac_intr_status_reg while IM Init. |
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Frequency Traceable Flag is set to false on downstream routers when 1pps is made down on TGM |
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After PTP reconfiguration, slave stuck in freq-lock state. |
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DATA traffic getting wrongly classified in H-QoS |
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DS3 VCOP : AIS is not cleared after reload with loopback local configured on VCoP DS3 interface |
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Mac Flap Syslog Notification |
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Broadcast Storm detected when interface is brought up |
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Routers Arbitrary File Overwrite Vulnerability |
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VLAN based egress classfication fails for incoming untagged frames; and for tagged frames with POP0 |
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CEM shows up in logs when serial card is unpowered. |
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RSP3_GNSS: ToD down after reload on G8275.1T-BC |
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RSP3 PTP BC is not locking to the Master via intermediate PTP aware nodes with tagging enabled. |
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IOT-E&M_CAS:-X-connect down and observed Pseudowire type mismatch with peer error |
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Dynamic stream are getting deleted on ASR920 router with G8275.2 profile <POLARIS> Timing THS |
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DOM not working for SFP-10G-LR from cisco-AVAGO vendor |
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IOT: Session status for RawSocket Server is not correctly displayed. |
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IOT: CLI Allows same TCP port to be configured for the clients and servers. |
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IOT: Raw-Socket TCP Session details is displaying the truncated VRF Names |
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Configured priority2 under ptp clock is not sent downstream when T- BC selected VP |
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Unable to retrieve stream with G8275.2 profile <POLARIS> Timing THS |
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RSP1-Continous ESMC tracebacks observed after IMA8T OIR followed by SSO |
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Two PW-Group switchover notifications are triggered from PI to PD for a single event |
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Traffic drop, on reconfiguring l2vpn sessions after sso on peer |
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ISIS FRR : FRR ReOpt Issue, FRR state pointing to Label backup even with primary link up |
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Caveat ID Number |
Description |
|---|---|
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Broadcast Storm detected when interface is brought up. |
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Crash due to DHCP snooping at the moment of changing a bridge domain. |
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Label mismatch and traffic black holing |
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Egress i/f and L2 "unknown" causing packet drops and traffic blackholing |
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rLFA repair path stays programmed in HW even when primary is back UP |
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IGMP snooping: Packet drops due to IGMP leave scenario in different BD |
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ipIfStatsOutForwDatagrams.ipv6 does not increment on 10GigE intf |
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IPsec offload for Data encryption is not supported |
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bootflash flooding with pman message - ISR (slice-3) 'XGPCS_LINE_RX_RXINT |
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IOMD ERR logs on auto-neg observed conitnuously which leads to bootflash space exhaustion |
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SyncE input does not work on Copper AMS ports configured in auto media-detect mode |
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BCPoMLPPP: %FMFP-3-OBJ_DWNLD_TO_DP_FAILED console logs results in pending/error object |
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Caveat ID Number |
Description |
|---|---|
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1 PPS under a virtual port remains down after SSO |
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IPv4 ACL is still active when deleted from interface configuration |
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IPv6-access list with fragments dropping non fragments packets |
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Manager Process crashes at bfd_oamengine_ui_get_tx_buffer_table_idx |
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"MET ENTRYS EXHAUSTED" caused router to crash |
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AN:L2 Channel creation failure |
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L2: OSPF over untag BDI failed after switching from tagged BDI to untag |
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Not able to scale IPv4 Tunnels for MVPN GRE |
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Throughput shows inaccurate values in SADT statistics for 1564 |
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Unable to configure BGP EVPN services |
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System crash with MVPN GRE with sdm default template |
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****MET ENTRYS EXHAUSTED ***** logs seen frequently |
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Out of order/duplicate packets received at the mutlicast receiver end |
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Traffic drop seen for some multicast groups after interface flap in mpls P2MP setup |
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BDI MTU config gets lost after reboot |
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Power over Ethernet support removal in 16.5.1 |
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Temperature raise syslog message prints on console when PSU remove and insertion |
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