17.3.2 Checking IPv4 Multicast Extranet

You can use show ip mroute and show ip mcache commands to refer to entries forwarded between VRF by IPv4 multicast extranets. Entries that issue a forwarding request to a different VRF are displayed in incoming with the forwarding request destination VRF ID. In addition, entries that allow forwarding requests from different VRF are displayed in VRF ID in outgoing.

Figure 17-3: Result of executing show ip mroute command
> show ip mroute vrf all group 224.10.10.10 source 192.168.100.1 Date 20XX/12/10 02:34:22 UTC Total: 4 routes VRF: global Total: 1 route , 1 group , 1 source (S,G) 1 routes ----------------------------------------------------- Group Address Source Address Protocol Flags Uptime Expires Assert 224.10.10.10 192.168.100.1 SM 00:03 03:27 00:00 incoming: VRF 2 upstream: Extra reg-sup: 0s outgoing: VLAN0010(192.168.10.1) uptime 00:03 expires 03:27 VLAN0011(192.168.11.1) uptime 00:03 expires 03:27 VRF: 2 Total: 1 routes, 1 groups, 1 source (S,G) 1 routes ----------------------------------------------------- Group Address Source Address Protocol Flags Uptime Expires Assert 224.10.10.10 192.168.100.1 SM L 00:03 03:27 00:00 incoming: VLAN0020(192.168.20.1) upstream: 192.168.20.2 outgoing: VLAN0021(192.168.21.1) uptime 00:03 expires 03:27 global uptime --:-- VRF 3 uptime --:-- VRF 4 uptime --:-- VRF: 3 Total: 1 routes, 1 groups, 1 source (S,G) 1 routes ----------------------------------------------------- Group Address Source Address Protocol Flags Uptime Expires Assert 224.10.10.10 192.168.100.1 SM L 00:03 03:27 00:00 incoming: VRF 2 upstream: Extra reg-sup: 0s outgoing: VLAN0030(192.168.30.1) uptime 00:03 expires --:-- VRF: 4 Total: 1 routes, 1 groups, 1 source (S,G) 1 routes ----------------------------------------------------- Group Address Source Address Protocol Flags Uptime Expires Assert 224.10.10.10 192.168.100.1 SM 00:03 03:27 00:00 incoming: VRF 2 upstream: Extra reg-sup: 0s outgoing: VLAN0040(192.168.40.1) uptime 00:03 expires 03:27

Figure 17-3: Result of executing show ip mroute command

> show ip mroute vrf all group 224.10.10.10 source 192.168.100.1
Date 20XX/12/10 02:34:22 UTC
Total: 4 routes
VRF: global  Total: 1 route , 1 group , 1 source
 
(S,G) 1 routes  -----------------------------------------------------
Group Address  Source Address  Protocol Flags  Uptime  Expires  Assert
224.10.10.10   192.168.100.1   SM               00:03   03:27    00:00
    incoming: VRF 2     upstream: Extra  reg-sup: 0s
    outgoing: VLAN0010(192.168.10.1)     uptime 00:03  expires 03:27
              VLAN0011(192.168.11.1)     uptime 00:03  expires 03:27
 
VRF: 2  Total: 1 routes, 1 groups, 1 source
 
(S,G) 1 routes  -----------------------------------------------------
Group Address  Source Address  Protocol Flags  Uptime  Expires  Assert
224.10.10.10   192.168.100.1   SM       L       00:03   03:27    00:00
    incoming: VLAN0020(192.168.20.1)     upstream: 192.168.20.2
    outgoing: VLAN0021(192.168.21.1)     uptime 00:03  expires 03:27
              global                     uptime --:--
              VRF 3                      uptime --:--
              VRF 4                      uptime --:--
 
VRF: 3  Total: 1 routes, 1 groups, 1 source
 
(S,G) 1 routes  -----------------------------------------------------
Group Address  Source Address  Protocol Flags  Uptime  Expires  Assert
224.10.10.10   192.168.100.1   SM       L       00:03   03:27    00:00
    incoming: VRF 2     upstream: Extra  reg-sup: 0s
    outgoing: VLAN0030(192.168.30.1)     uptime 00:03  expires --:--
 
VRF: 4  Total: 1 routes, 1 groups, 1 source
 
(S,G) 1 routes  -----------------------------------------------------
Group Address  Source Address  Protocol Flags  Uptime  Expires  Assert
224.10.10.10   192.168.100.1   SM               00:03   03:27    00:00
    incoming: VRF 2     upstream: Extra  reg-sup: 0s
    outgoing: VLAN0040(192.168.40.1)     uptime 00:03  expires 03:27

Figure 17-4: Result of executing show ip mcache command
> show ip mcache vrf all source 192.168.100.1 group 224.10.10.10 Date 20XX/12/10 02:34:43 UTC Total: 4 routes VRF: global Total: 1 route - Forwarding entry -------------------------------------------------- Group Address Source Address Flags Uptime Expires 224.10.10.10 192.168.100.1 D 00:19 03:27 incoming: VRF 2 outgoing: VLAN0010(192.168.10.1) VLAN0011(192.168.11.1) VRF: 2 Total: 1 routes - Forwarding entry -------------------------------------------------- Group Address Source Address Flags Uptime Expires 224.10.10.10 192.168.100.1 U 00:19 03:27 incoming: VLAN0020(192.168.20.1) outgoing: VLAN0021(192.168.21.1) VLAN0010(192.168.10.1) global VLAN0011(192.168.11.1) global VLAN0030(192.168.30.1) VRF 3 VLAN0040(192.168.40.1) VRF 4 VRF: 3 Total: 1 routes - Forwarding entry --------------------------------------------------- Group Address Source Address Flags Uptime Expires 224.10.10.10 192.168.100.1 D 00:19 03:27 incoming: VRF 2 outgoing: VLAN0030(192.168.30.1) VRF: 4 Total: 1 routes - Forwarding entry --------------------------------------------------- Group Address Source Address Flags Uptime Expires 232.0.0.1 192.168.200.1 D 00:18 03:27 incoming: VRF 2 outgoing: VLAN0040(192.168.40.1)

Figure 17-4: Result of executing show ip mcache command

> show ip mcache vrf all source 192.168.100.1 group 224.10.10.10
Date 20XX/12/10 02:34:43 UTC
Total: 4 routes
VRF: global  Total: 1 route
- Forwarding entry --------------------------------------------------
Group Address   Source Address  Flags  Uptime  Expires
224.10.10.10    192.168.100.1   D       00:19   03:27
     incoming:
         VRF 2
     outgoing:
         VLAN0010(192.168.10.1)
         VLAN0011(192.168.11.1)
 
VRF: 2  Total: 1 routes
- Forwarding entry --------------------------------------------------
Group Address   Source Address  Flags  Uptime  Expires
224.10.10.10    192.168.100.1   U       00:19   03:27
     incoming:
         VLAN0020(192.168.20.1)
     outgoing:
         VLAN0021(192.168.21.1)
         VLAN0010(192.168.10.1)     global
         VLAN0011(192.168.11.1)     global
         VLAN0030(192.168.30.1)     VRF 3
         VLAN0040(192.168.40.1)     VRF 4
 
VRF: 3  Total: 1 routes
- Forwarding entry ---------------------------------------------------
Group Address   Source Address  Flags  Uptime  Expires
224.10.10.10    192.168.100.1   D       00:19   03:27
     incoming:
         VRF 2
     outgoing:
         VLAN0030(192.168.30.1)
 
VRF: 4  Total: 1 routes
- Forwarding entry ---------------------------------------------------
Group Address   Source Address  Flags  Uptime  Expires
232.0.0.1       192.168.200.1   D       00:18   03:27
     incoming:
         VRF 2
     outgoing:
         VLAN0040(192.168.40.1)