Use the boot config flags command to enable IPv6 egress filters and to add IPv6 egress qualifiers at startup.
This flag is disabled by default.
Note
Product Notice: For 5320 Series and 5420 Series platforms, the boot config flags ipv6-egress-filter and boot config flags macsec commands are mutually exclusive.
If more than 200 IPv4 egress entries exist in the configuration file, make a backup of the configuration file before you enable IPv6 egress filters. Only a maximum of 200 IPv4 egress entries are saved in the configuration file after you use the save config command.
For example, you can enter more than 200 IPv4 egress entries in the configuration file prior to enabling IPv6 egress filters. However, the entries are stored in ascending numerical order with ACL ID and ACE ID respectively, and not in the order in which they were added. Therefore, after you enable IPv6 egress filters and restart, and because the configuration file is read in ascending order, you receive an error message after the 200 maximum has been reached, such as:
CP1 [2017-09-28T00:44:24.077+05:30] 7K-Fi-94-I6:1 0x001049d4 00000000 GlobalRouter FILTER ERROR Unable to allocate data path resources for ACL ID 12.
enable
configure terminal
boot config flags ipv6-egress-filter
show boot config flags
Switch:1>enable Switch:1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Switch:1(config)#boot config flags ipv6-egress-filter Warning: Please save the configuration and reboot the switch for this configuration to take effect.
Note
Flag support can vary across hardware models.
Switch:1#show boot config flags flags advanced-feature-bandwidth-reservation low flags block-snmp false flags debug-config false flags debugmode false flags dvr-leaf-mode false flags enhancedsecure-mode false flags factorydefaults false flags flow-control-mode true flags ftpd true flags hsecure false flags ipv6-egress-filter true flags ipv6-mode false flags logging true flags macsec false flags nni-mstp false flags reboot true flags spanning-tree-mode mstp flags spbm-config-mode true flags spbm-node-scaling true flags sshd true flags syslog-rfc5424-format true flags telnetd true flags tftpd true flags trace-logging false flags urpf-mode true flags verify-config true flags vrf-scaling true flags vxlan-gw-full-interworking-mode false