Netboot Subnets and TTL

[MattieNumNums]

Here is what our Network admin is telling me. Can anyone give me some advice on how to remedy this?

—

In both traces from b89 and b101, the multicast TTL is set to 1. This means multicast is limited to local subnet. Is there a way for you to modify the TTL?
Please have someone take a wireshark trace from Charlotte? I’d like to see the multicast TTL setting for Charlotte.
I attached procedures for starting wireshark packet capture.

No. Time Source Destination Protocol Info
151 25.825623 XXX.XXX.XXX.XXX 224.0.0.2 IGMP V2 Leave Group 224.0.0.251

Frame 151: 60 bytes on wire (480 bits), 60 bytes captured (480 bits)
Ethernet II, Src: Apple_45:64:99 (00:00:00:00:00:00), Dst: IPv4mcast_00:00:02 (00:00:00:00:00:00)
Internet Protocol, Src: XXX.XXX.XXX.XXX (XXX.XXX.XXX.XXX), Dst: 224.0.0.2 (224.0.0.2)
Version: 4
Header length: 24 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
Total Length: 32
Identification: 0x584b (22603)
Flags: 0x00
0… …. = Reserved bit: Not set
.0.. …. = Don’t fragment: Not set
..0. …. = More fragments: Not set
Fragment offset: 0
Time to live: 1
Protocol: IGMP (2)
Header checksum: 0x52a1 [correct]
[Good: True]
[Bad: False]
Source: XXX.XXX.XXX.XXX (XXX.XXX.XXX.XXX)
Destination: 224.0.0.2 (224.0.0.2)
Options: (4 bytes)
Router Alert: Every router examines packet
Internet Group Management Protocol
[IGMP Version: 2]
Type: Leave Group (0x17)
Max Response Time: 0.0 sec (0x00)
Header checksum: 0x0804 [correct]
Multicast Address: 224.0.0.251 (224.0.0.251)

[Author]

Posts