Catalyst 3550 基于VRF的组播(MVRF)配置

1、在启用VRF前,需用sdm prefer routing extended-match命令调整TCAM(重启后生效),可以用show sdm prefer命令查看当前使用的template。
router#show sdm prefer        
 The current template is the routing extended-match template.
 The selected template optimizes the resources in
 the switch to support this level of features for
 8 routed interfaces and 1K VLANs.

 number of unicast mac addresses:   5K
 number of igmp groups:             1K
 number of qos aces:                512
 number of security aces:           512
 number of unicast routes:          8K
 number of multicast routes:        1K

2、MVRF配置
ip vrf test
 rd 100:1
 route-target export 100:1
 route-target import 100:1

ip multicast-routing
ip multicast-routing vrf test
ip pim vrf test rp-address 192.168.0.254

interface Vlan10
 description "Uplink vlan"
 ip vrf forwarding test
 ip address 192.168.10.1 255.255.255.0
 ip pim sparse-mode

interface Vlan100
 description "Users Vlan"
 ip vrf forwarding test
 ip address 192.168.100.254 255.255.255.0
 ip pim sparse-mode

3、问题处理
   (1) 起初配置时,以为象Catalyst3750G一样,只需在VRF内启用multicast-routing,配置完成后,在 vlan100上配置ip igmp join-group 239.192.0.1命令测试组播,发现无法建立source Tree,相关命令查看信息如下(注:下述全部略去(*, 224.0.1.40)条目相关信息):
router#show ip mroute vrf test
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
       L - Local, P - Pruned, R - RP-bit set, F - Register flag,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report,
       Z - Multicast Tunnel, z - MDT-data group sender,
       Y - Joined MDT-data group, y - Sending to MDT-data group
       V - RD & Vector, v - Vector
Outgoing interface flags: H - Hardware switched, A - Assert winner
 Timers: Uptime/Expires
 Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 239.192.0.1), 00:02:55/00:02:36, RP 192.168.0.254, flags: SJCL
  Incoming interface: Vlan10, RPF nbr 192.168.10.254
  Outgoing interface list:
    Vlan100, Forward/Sparse, 00:02:55/00:02:36
从上可以看出,mroute中无(S,G)条目,亦即未建立Source Tree。

router#show ip mroute vrf test count
IP Multicast Statistics
2 routes using 1140 bytes of memory
2 groups, 0.00 average sources per group
Forwarding Counts: Pkt Count/Pkts(neg(-) = Drops) per second/Avg Pkt Size/Kilobits per second
Other counts: Total/RPF failed/Other drops(OIF-null, rate-limit etc)

Group: 239.192.0.1, Source count: 0, Packets forwarded: 0, Packets received: 0

router#show ip mroute vrf test active                  
Active IP Multicast Sources - sending >= 4 kbps
 a negative (-) Rate counts pps being fast-dropped

router#show ip pim vrf test interface vlan 100 count

State: * - Fast Switched, D - Distributed Fast Switched
       H - Hardware Switching Enabled
Address          Interface                FS  Mpackets In/Out
192.168.100.254   Vlan100                  * H 0/0
从上面几条命令显示结果可以看出,交换机并未接收到组播数据,即使mroute中有(*, 239.192.0.1)条目,并加入了RP-tree,但由于上级PE通过Source Tree发布组播数据,所以未收到。

    (2) 全局配置ip multicast-routing命令后,mroute中就有了(S,G)条目,也能正常收到组播数据了。相关命令显示信息如下:
router#show ip mroute vrf test       
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
       L - Local, P - Pruned, R - RP-bit set, F - Register flag,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report,
       Z - Multicast Tunnel, z - MDT-data group sender,
       Y - Joined MDT-data group, y - Sending to MDT-data group
       V - RD & Vector, v - Vector
Outgoing interface flags: H - Hardware switched, A - Assert winner
 Timers: Uptime/Expires
 Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 239.192.0.1), 00:15:17/stopped, RP 192.168.0.254, flags: SJCL
  Incoming interface: Vlan10, RPF nbr 192.168.10.254
  Outgoing interface list:
    Vlan100, Forward/Sparse, 00:15:17/00:02:19

(192.168.1.1, 239.192.0.1), 00:00:07/00:02:59, flags: LJT
  Incoming interface: Vlan10, RPF nbr 192.168.10.254
  Outgoing interface list:
    Vlan100, Forward/Sparse, 00:00:07/00:02:52


router#show ip mroute vrf test active
Active IP Multicast Sources - sending >= 4 kbps
 a negative (-) Rate counts pps being fast-dropped

Group: 239.192.0.1, (?)
   Source: 192.168.1.1 (?)
     Rate: 295 pps/3131 kbps(1sec), 2984 kbps(last 40 secs), 3269 kbps(life avg)


router#show ip mroute vrf test count 
IP Multicast Statistics
3 routes using 1604 bytes of memory
2 groups, 0.50 average sources per group
Forwarding Counts: Pkt Count/Pkts(neg(-) = Drops) per second/Avg Pkt Size/Kilobits per second
Other counts: Total/RPF failed/Other drops(OIF-null, rate-limit etc)

Group: 239.192.0.1, Source count: 1, Packets forwarded: 18648, Packets received: 18648
  RP-tree: Forwarding: 0/0/0/0, Other: 0/0/0
  Source: 192.168.1.1/32, Forwarding: 18648/288/1325/3055, Other: 18648/0/0


router#show ip pim vrf test interface vlan 100 count

State: * - Fast Switched, D - Distributed Fast Switched
       H - Hardware Switching Enabled
Address          Interface                FS  Mpackets In/Out
192.168.100.254   Vlan100                  * H 0/31119

posted on 2011-05-17 12:08 梯玛 阅读(1079) 评论(0)  编辑 收藏 引用 所属分类: 网络知识

只有注册用户登录后才能发表评论。

导航

<2024年3月>
252627282912
3456789
10111213141516
17181920212223
24252627282930
31123456

统计

常用链接

留言簿(1)

随笔分类

随笔档案

文章分类

搜索

最新评论

阅读排行榜

评论排行榜