ZyXEL XGS4700-48F User Guide - Page 349

Chapter 38 DVMRP The following table describes the labels in this screen. Table 123 IP Application > DVMRP LABEL DESCRIPTION Active Select Active to enable DVMRP on the Switch. You should do this if you want the Switch to act as a multicast router. Threshol d Threshold is the maximum time to live (TTL) value. TTL is used to limit the scope of multicasting. You should reduce this value if you do not wish to flood Layer-3 devices many hops away with multicast traffic. This applies only to multicast traffic this Switch sends out. Index Index is the DVMRP configuration for the IP routing domain defined under Network. The maximum number of DVMRP configurations allowed is the maximum number of IP routing domains allowed on the Switch. See Section 8.6 on page 113 for more information on IP routing domains. Network This is the IP routing domain IP address and subnet mask you set up in IP Setup. VID DVMRP cannot be enabled on the same VLAN group across different IP routing domains, that is, you cannot have duplicate VIDs for different DVMRP configurations (see Figure 180 on page 350). Active Select Active to enable DVMRP on this IP routing domain. Apply Click Apply to save your changes to the Switch's run-time memory. The Switch loses these changes if it is turned off or loses power, so use the Save link on the top navigation panel to save your changes to the non-volatile memory when you are done configuring. Cancel Click Cancel to begin configuring this screen afresh. 38.3.1 DVMRP Configuration Error Messages You must have IGMP enabled when you enable DVMRP; otherwise you see the screen as in the next figure. Figure 178 DVMRP: IGMP Not Set Error When you disable IGMP, but DVMRP is still active you also see another warning screen. Figure 179 DVMRP: Unable to Disable IGMP Error XGS4700-48F User's Guide 349