ZyXEL Communications GS1920-48HP - Page 4

4/6
www.zyxel.com
Known Issue:
1. [Bandwidth Control] Ingress rate limit of TCP traffic might have inaccuracy with
some criteria.
2. [Security] Fake IP traffic cannot be filtered when a static IP binding existed.
3. [DIAG] The cable length resolution of Cable Diagnostic is about +-15 meter.
4. [DIAG] The fault distance of Cable Diagnostic is less than 1 meter without cable
inserted.
5. [MGMT] GS1920 is cluster manager and the cluster member won’t upgrade
firmware via FTP if firmware size is over than 4.8MB.
Limitation of Settings:
1. 802.1Q Static VLANs 1K
2. Static MAC forwarding entry 256
3. MAC filtering entry 256
4. Cluster member 24
5. Protocol based VLAN entries per port 7
6. Port-security max address-limit number 16K
7. Syslog server entry 4
8. IP source guard entry 512
9. IP subnet based VLAN entry 16
10. DHCP snooping binding table 16K
11. Multicast group 1024
12. ACL 256
13. DHCP Entry 16
14. Trunk groups 14(24 ports)/ 16(48 ports)
15. Per trunk group port number 8
16. MSTP instance 0-15
17. MAC-based VLAN 28(24 ports)/ 50(48 ports)
18. Voice VLAN OUI entry 6
19. ZON neighbor per-port maximum clients 10